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"content": "\u003cp>Experts have long agreed that San Francisco is due for a \u003ca href=\"https://www.kqed.org/news/12080455/san-franciscos-skyline-shines-but-earthquake-risk-remains-120-years-after-1906\">big earthquake\u003c/a> at any moment on any day. But the city isn’t quite ready for a massive shaking, like the 1989 Loma Prieta or the \u003ca href=\"https://www.kqed.org/news/11983182/stunning-archival-photos-of-the-1906-earthquake-and-fire\">1906 earthquake\u003c/a> that leveled much of the city.\u003c/p>\n\u003cp>City leaders have asked residents to approve a \u003ca href=\"https://sfpublicworks.org/eser-2026\">$535 million \u003c/a>earthquake bond in June, which would fund major seismic upgrades to public infrastructure. The goal is to improve the city’s capacity to respond quickly after a major earthquake and to aid in the aftermath.\u003c/p>\n\u003cp>Federal seismologists said back in 2014 that there’s \u003ca href=\"https://www.usgs.gov/faqs/what-probability-earthquake-will-occur-los-angeles-area-san-francisco-bay-area#:~:text=San%20Francisco%20Bay%20area%3A,an%20earthquake%20measuring%20magnitude%207.5\">nearly a three-in-four chance\u003c/a> of a 6.7-magnitude quake by 2044, and we’re already more than a decade into that timeline.\u003c/p>\n\u003cp>[ad fullwidth]\u003c/p>\n\u003cp>“By passing this bond, we are taking steps to keep San Francisco safe by giving our neighborhoods the tools they need to withstand emergency events and ensuring our city is ready to respond quickly when disaster strikes,” Mayor Daniel Lurie said in a \u003ca href=\"https://www.sf.gov/news-mayor-lurie-and-president-mandelman-announce-2026-earthquake-safety-and-emergency-response-bond-to-modernize-infrastructure-and-support-public-safety\">press release\u003c/a>.\u003c/p>\n\u003cp>The entire Bay Area rests on multiple faultlines — including the San Andreas and the Hayward faults. Earthquake impacts could “cascade across shared infrastructure, housing, and lifelines” throughout San Francisco, according to a \u003ca href=\"https://www.spur.org/publications/policy-brief/2026-04-09/120-years-after-1906\">recent report\u003c/a> from the nonprofit think tank SPUR. The report concludes that large portions of the city are potentially ill-prepared for a major earthquake. Namely, some 3,700 concrete buildings that could potentially pancake in a tremor.\u003c/p>\n\u003cfigure id=\"attachment_2000800\" class=\"wp-caption aligncenter\" style=\"max-width: 1999px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2000800\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/260115-SOTC-30-BL_qed.jpg\" alt=\"\" width=\"1999\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/260115-SOTC-30-BL_qed.jpg 1999w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/260115-SOTC-30-BL_qed-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/260115-SOTC-30-BL_qed-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/260115-SOTC-30-BL_qed-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 1999px) 100vw, 1999px\">\u003cfigcaption class=\"wp-caption-text\">Mayor Daniel Lurie speaks to the press after giving a State of the City address at Rossi Park Ball Field in the Richmond neighborhood of San Francisco on Jan. 15, 2026. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>Brian Strong, the city’s chief resilience officer, said San Francisco spent more than $20 billion on seismic upgrades over the past several decades, but more needs to be done.\u003c/p>\n\u003cp>“We’ve touched every neighborhood in the city, and we still have a lot of work to do, which is why another bond is coming up,” Strong said.\u003c/p>\n\u003cp>Voters approved similar bonds in 2010, 2014, and 2020 as part of a so-called phased approach in shoring up the city’s seismic risk.\u003c/p>\n\u003cp>Mary Ellen Carroll, executive director of the San Francisco Department of Emergency Management, said the bond would pay for “big ticket items” that need updating. That includes making the city’s 911 call center “secure from a seismic perspective, so we’re functioning after an emergency,” Carroll said.[aside postID=news_12080455 hero='https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-06-BL-KQED.jpg']The bond will focus on five areas: renovating the city’s aging emergency firefighting water system, potentially repairing five unsafe fire stations, updating police stations and support facilities and updating public safety buildings\u003c/p>\n\u003cp>At $200 million, the largest pot of funds would go to retrofitting and replacing Muni’s more-than-a-century-old Potrero Bus Yard with a seismically safe facility. Some \u003ca href=\"https://westsideobserver.com/26/4-prop-a-eser-bond-slush-fund-no-vote-george-wooding.php\">criticized\u003c/a> the move as a transportation spending item. But city officials said Potrero Yard is important for “enabling evacuation services following an earthquake.”\u003c/p>\n\u003cp>“Potrero Yard is at serious risk in a major earthquake,” said Julie Kirschbaum, San Francisco Municipal Transportation Agency director of transportation, in a release. “We have to protect our buses and, more importantly, the lives of the staff who maintain and operate them.\u003c/p>\n\u003cp>The second-highest dollar amount is $130 million to expand the city’s emergency firefighting water system “into underserved areas on the west side,” which, city officials said, “lack adequate firefighting water infrastructure.” The updates could include extending high-pressure water pipelines, adding fire hydrants, and other infrastructure.\u003c/p>\n\u003cp>Some people have \u003ca href=\"https://www.sfexaminer.com/forum/expand-the-city-s-emergency-water-system-before-its-too-late/article_19b70ccb-99e6-4dac-928d-297996a80939.html\">suggested\u003c/a> that relying on the Pacific Ocean’s copious water would be a better use of the funds. The plan would also update infrastructure at Fort Mason to pump water from the bay during an event.\u003c/p>\n\u003cp>“Many west side facilities, including fire stations, the Taraval Police Station, and our emergency water system, are older and more vulnerable in a major quake,” District 4 Supervisor Alan Wong said in a release. “This bond is an important step toward making sure the Sunset is not an afterthought and that our communities have the infrastructure they need to stay safe and recover.”\u003c/p>\n\u003cp>\u003c/p>\n",
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"excerpt": "Over the years, San Francisco has made progress toward earthquake-safe buildings. But the city still isn’t fully prepared for the next big one, experts said. ",
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"title": "In June, San Francisco Will Vote on a $535M Earthquake Bond. Here’s What’s in It | KQED",
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"headline": "In June, San Francisco Will Vote on a $535M Earthquake Bond. Here’s What’s in It",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003cp>Experts have long agreed that San Francisco is due for a \u003ca href=\"https://www.kqed.org/news/12080455/san-franciscos-skyline-shines-but-earthquake-risk-remains-120-years-after-1906\">big earthquake\u003c/a> at any moment on any day. But the city isn’t quite ready for a massive shaking, like the 1989 Loma Prieta or the \u003ca href=\"https://www.kqed.org/news/11983182/stunning-archival-photos-of-the-1906-earthquake-and-fire\">1906 earthquake\u003c/a> that leveled much of the city.\u003c/p>\n\u003cp>City leaders have asked residents to approve a \u003ca href=\"https://sfpublicworks.org/eser-2026\">$535 million \u003c/a>earthquake bond in June, which would fund major seismic upgrades to public infrastructure. The goal is to improve the city’s capacity to respond quickly after a major earthquake and to aid in the aftermath.\u003c/p>\n\u003cp>Federal seismologists said back in 2014 that there’s \u003ca href=\"https://www.usgs.gov/faqs/what-probability-earthquake-will-occur-los-angeles-area-san-francisco-bay-area#:~:text=San%20Francisco%20Bay%20area%3A,an%20earthquake%20measuring%20magnitude%207.5\">nearly a three-in-four chance\u003c/a> of a 6.7-magnitude quake by 2044, and we’re already more than a decade into that timeline.\u003c/p>\n\u003cp>\u003c/p>\u003c/div>",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003c/p>\n\u003cp>“By passing this bond, we are taking steps to keep San Francisco safe by giving our neighborhoods the tools they need to withstand emergency events and ensuring our city is ready to respond quickly when disaster strikes,” Mayor Daniel Lurie said in a \u003ca href=\"https://www.sf.gov/news-mayor-lurie-and-president-mandelman-announce-2026-earthquake-safety-and-emergency-response-bond-to-modernize-infrastructure-and-support-public-safety\">press release\u003c/a>.\u003c/p>\n\u003cp>The entire Bay Area rests on multiple faultlines — including the San Andreas and the Hayward faults. Earthquake impacts could “cascade across shared infrastructure, housing, and lifelines” throughout San Francisco, according to a \u003ca href=\"https://www.spur.org/publications/policy-brief/2026-04-09/120-years-after-1906\">recent report\u003c/a> from the nonprofit think tank SPUR. The report concludes that large portions of the city are potentially ill-prepared for a major earthquake. Namely, some 3,700 concrete buildings that could potentially pancake in a tremor.\u003c/p>\n\u003cfigure id=\"attachment_2000800\" class=\"wp-caption aligncenter\" style=\"max-width: 1999px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2000800\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/260115-SOTC-30-BL_qed.jpg\" alt=\"\" width=\"1999\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/260115-SOTC-30-BL_qed.jpg 1999w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/260115-SOTC-30-BL_qed-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/260115-SOTC-30-BL_qed-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/260115-SOTC-30-BL_qed-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 1999px) 100vw, 1999px\">\u003cfigcaption class=\"wp-caption-text\">Mayor Daniel Lurie speaks to the press after giving a State of the City address at Rossi Park Ball Field in the Richmond neighborhood of San Francisco on Jan. 15, 2026. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>Brian Strong, the city’s chief resilience officer, said San Francisco spent more than $20 billion on seismic upgrades over the past several decades, but more needs to be done.\u003c/p>\n\u003cp>“We’ve touched every neighborhood in the city, and we still have a lot of work to do, which is why another bond is coming up,” Strong said.\u003c/p>\n\u003cp>Voters approved similar bonds in 2010, 2014, and 2020 as part of a so-called phased approach in shoring up the city’s seismic risk.\u003c/p>\n\u003cp>Mary Ellen Carroll, executive director of the San Francisco Department of Emergency Management, said the bond would pay for “big ticket items” that need updating. That includes making the city’s 911 call center “secure from a seismic perspective, so we’re functioning after an emergency,” Carroll said.\u003c/p>\u003c/div>",
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"content": "\u003cdiv class=\"post-body\">\u003cp>The bond will focus on five areas: renovating the city’s aging emergency firefighting water system, potentially repairing five unsafe fire stations, updating police stations and support facilities and updating public safety buildings\u003c/p>\n\u003cp>At $200 million, the largest pot of funds would go to retrofitting and replacing Muni’s more-than-a-century-old Potrero Bus Yard with a seismically safe facility. Some \u003ca href=\"https://westsideobserver.com/26/4-prop-a-eser-bond-slush-fund-no-vote-george-wooding.php\">criticized\u003c/a> the move as a transportation spending item. But city officials said Potrero Yard is important for “enabling evacuation services following an earthquake.”\u003c/p>\n\u003cp>“Potrero Yard is at serious risk in a major earthquake,” said Julie Kirschbaum, San Francisco Municipal Transportation Agency director of transportation, in a release. “We have to protect our buses and, more importantly, the lives of the staff who maintain and operate them.\u003c/p>\n\u003cp>The second-highest dollar amount is $130 million to expand the city’s emergency firefighting water system “into underserved areas on the west side,” which, city officials said, “lack adequate firefighting water infrastructure.” The updates could include extending high-pressure water pipelines, adding fire hydrants, and other infrastructure.\u003c/p>\n\u003cp>Some people have \u003ca href=\"https://www.sfexaminer.com/forum/expand-the-city-s-emergency-water-system-before-its-too-late/article_19b70ccb-99e6-4dac-928d-297996a80939.html\">suggested\u003c/a> that relying on the Pacific Ocean’s copious water would be a better use of the funds. The plan would also update infrastructure at Fort Mason to pump water from the bay during an event.\u003c/p>\n\u003cp>“Many west side facilities, including fire stations, the Taraval Police Station, and our emergency water system, are older and more vulnerable in a major quake,” District 4 Supervisor Alan Wong said in a release. “This bond is an important step toward making sure the Sunset is not an afterthought and that our communities have the infrastructure they need to stay safe and recover.”\u003c/p>\n\u003cp>\u003c/p>\n\u003c/div>\u003c/p>",
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"slug": "san-franciscos-skyline-shines-but-earthquake-risk-remains-120-years-after-1906",
"title": "San Francisco’s Skyline Shines, but Earthquake Risk Remains 120 Years After 1906",
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"content": "\u003cp>\u003ca href=\"https://www.kqed.org/news/12069967/mayor-lurie-on-san-francisco-we-are-on-our-way-back-but-we-still-have-work-to-do\">San Franciscans\u003c/a> love to gather at Dolores Park to watch the skyline glow at sunset. The hard edges of the \u003ca href=\"https://www.kqed.org/news/11934056/the-transamerica-pyramid-at-50-from-architectural-butchery-to-icon\">Transamerica Pyramid\u003c/a> catch the light. Then the San Francisco Marriott Marquis, with its Art Deco-inspired windows, and finally, the spiraling silvery-grey of the Salesforce Tower.\u003c/p>\n\u003cp>But when Mary Ellen Carroll looks out at the skyline and rows of Victorian homes with soft-story ground floors, she’s filled with anxiety.\u003c/p>\n\u003cp>“I see all these people, all these buildings, and the extent of the need that could occur after a big earthquake,” said Carroll, executive director of the San Francisco Department of Emergency Management. “How many people are ready for that?”\u003c/p>\n\u003cp>[ad fullwidth]\u003c/p>\n\u003cp>That “heavy responsibility” for Carroll shakes up every April 18, the anniversary of the \u003ca href=\"https://www.kqed.org/news/10930485/see-how-san-francisco-rebuilt-110-years-after-the-1906-quake\">1906 earthquake\u003c/a>. This year marks 120 years since the magnitude 7.9 rupture along the San Andreas fault roughly two miles offshore.\u003c/p>\n\u003cp>The quake and the fires that followed killed 3,000 people, leveled much of San Francisco and left more than half the \u003ca href=\"https://www.kqed.org/arts/13898345/the-1906-earthquake-survivor-who-fought-for-san-franciscos-homeless-population\">city’s residents unhoused\u003c/a>.\u003c/p>\n\u003cfigure id=\"attachment_12080164\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-12080164\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-01-BL-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-01-BL-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-01-BL-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-01-BL-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Mary Ellen Carroll, executive director of the San Francisco Department of Emergency Management, at her office in San Francisco City Hall on April 15, 2026. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>The anniversary reminds Carroll that the Bay Area remains extremely vulnerable.\u003c/p>\n\u003cp>There’s a 72% chance that a magnitude 6.7 earthquake or stronger will occur here in the next three decades, according to \u003ca href=\"https://www.usgs.gov/faqs/what-probability-earthquake-will-occur-los-angeles-area-san-francisco-bay-area#:~:text=San%20Francisco%20Bay%20area%3A,an%20earthquake%20measuring%20magnitude%207.5\">a 2014 analysis\u003c/a> from the United States Geological Survey.\u003c/p>\n\u003cp>When the earth shakes wildly again, it will do so in a Bay Area transformed from 1906, now home to a population more than 10 times larger.\u003c/p>\n\u003cfigure id=\"attachment_12080264\" class=\"wp-caption aligncenter\" style=\"max-width: 1973px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-12080264\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/240416-1906-san-francisco-KQED.jpg\" alt=\"\" width=\"1973\" height=\"1424\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/240416-1906-san-francisco-KQED.jpg 1973w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/240416-1906-san-francisco-KQED-160x115.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/240416-1906-san-francisco-KQED-1536x1109.jpg 1536w\" sizes=\"auto, (max-width: 1973px) 100vw, 1973px\">\u003cfigcaption class=\"wp-caption-text\">This photograph, taken by George Lawrence from a series of kites five weeks after the great earthquake of April 18, 1906, shows the devastation brought on the city of San Francisco by the quake and subsequent fire. The view is looking over Nob Hill toward the business district, South of the Slot, and the distant Mission. The Fairmont Hotel, far left. dwarfs the Call Building. \u003ccite>(Courtesy of Harry Myers)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>San Francisco spent more than $20 billion on seismic upgrades over the past several decades. The money went to \u003ca href=\"https://data.sfgov.org/Housing-and-Buildings/Map-of-Soft-Story-Properties/jwdp-cqyc\">retrofitting older brick and wood buildings\u003c/a>, seismic improvements to infrastructure, constructing new, safe hospitals, police and fire stations and strengthening emergency response systems.\u003c/p>\n\u003cp>But a \u003ca href=\"https://www.spur.org/publications/policy-brief/2026-04-09/120-years-after-1906\">new policy brief from the Bay Area think tank SPUR\u003c/a> warns that more than 3,700 pre-1995 concrete buildings — concentrated downtown — could face significant risk, and some fire hazards have gone unaddressed.\u003c/p>\n\u003cp>“There would definitely be buildings that could collapse,” said Sarah Atkinson, author of the report.\u003c/p>\n\u003cfigure id=\"attachment_12080162\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-12080162\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260413-SPUREARTHQUAKE-03-BL-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260413-SPUREARTHQUAKE-03-BL-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260413-SPUREARTHQUAKE-03-BL-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260413-SPUREARTHQUAKE-03-BL-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Sarah Atkinson, a hazard resilience senior policy manager at the San Francisco Bay Area Planning and Urban Research Association (SPUR), at the organization’s offices in San Francisco on April 13, 2026. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>The state has significantly improved its early warning system, too. While phone applications and alerts give people an \u003ca href=\"https://www.kqed.org/science/2000568/after-4-6-earthquake-jolts-santa-cruz-seismologists-double-down-on-myshake-alerts\">extra moment to drop and hold on\u003c/a>, they do little to improve a building’s seismic safety. Some researchers point to evidence that a much larger earthquake than the 1906 quake could shake the Bay Area.\u003c/p>\n\u003cp>Carroll said most San Franciscans cannot grasp what a colossal rattling will feel like.\u003c/p>\n\u003cp>“It’s going to take an earthquake for us to take an earthquake seriously,” Carroll said. “There will be catastrophic damage. It will interrupt the economy, likely take lives, and we’ll take considerable time to recover.”\u003c/p>\n\u003ch2>‘A big earthquake can happen again’\u003c/h2>\n\u003cp>Predicting where the next damaging Bay Area earthquake isn’t an exact science. Seismologists know a lot about faults: their general size, stress and history. But scientists can’t tell exactly when or where a rupture will occur.\u003c/p>\n\u003cp>Beneath the region, there lie many medium- to large-faults, including the San Andreas and Hayward faults, as well as many smaller fissures. Evan Hirakawa, a USGS research geophysicist, said seismologists are watching the Hayward Fault, which runs beneath the East Bay Hills, because it has the highest likelihood of a major earthquake.\u003c/p>\n\u003cp>The San Andreas has a lower probability because it experienced an intense quake a little more than a century ago, which is “recently” in geologic time.\u003c/p>\n\u003cfigure id=\"attachment_12080165\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-12080165\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-02-BL-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-02-BL-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-02-BL-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-02-BL-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">A view of high-rises in downtown San Francisco from Salesforce Park on April 15, 2026. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>But an impressive quake could also happen on a separate fracture.\u003c/p>\n\u003cp>“We see these old black and white pictures of people in 1906, dealing with the rubble, but in some ways [the next big quake] might not be that different,” Hirakawa said. “People should know that a big earthquake can happen again.”\u003c/p>\n\u003cp>Stephen Sherman Wade was 8 years old and living in Southern California when the 1994 Northridge earthquake shook his family’s home for more than 20 seconds.\u003c/p>\n\u003cp>“Beds shuddered against the wall,” Wade said. “It was terrifying.”\u003c/p>\n\u003cp>After moving to San Francisco’s SoMa neighborhood in 2020, he made it a priority to find a home that was seismically safe.\u003c/p>\n\u003cp>“No building is ever going to be 100% structurally sound against an earthquake,” Wade said, “but you can build pretty well for it.”\u003c/p>\n\u003ch2>‘We still have a lot of work to do’\u003c/h2>\n\u003cp>San Francisco’s earthquake dilemma is long-standing. The SPUR brief states that 60% of the city’s buildings were constructed prior to 1940, “without consideration for modern earthquake codes.”\u003c/p>\n\u003cp>Many are made of concrete, and in previous quakes elsewhere, similar buildings “pancaked on themselves,” causing “a lot of deaths,” Atkinson said.\u003c/p>\n\u003cp>In 1992, San Francisco developed a seismic hazard rating system to assess more than 200 city-owned buildings, using a 1-to-4 scale (best to worst). The city is still \u003ca href=\"https://onesanfrancisco.org/the-plan-2018/building-our-future-earthquakes#:~:text=Seismic%20Hazard%20Ratings%20(SHRs)%20were,prioritization%20of%20seismically%20vulnerable%20structures.\">working to address\u003c/a> many at-risk buildings.\u003c/p>\n\u003cfigure id=\"attachment_12080328\" class=\"wp-caption alignleft\" style=\"max-width: 1212px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-12080328\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260416-SPUR-Map-KQED.png\" alt=\"\" width=\"1212\" height=\"820\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260416-SPUR-Map-KQED.png 1212w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260416-SPUR-Map-KQED-160x108.png 160w\" sizes=\"auto, (max-width: 1212px) 100vw, 1212px\">\u003cfigcaption class=\"wp-caption-text\">A new policy brief from the Bay Area think tank SPUR warns that more than 3,700 pre-1995 concrete buildings could face significant risk if a large earthquake were to occur near San Francisco. The map highlighted in the SPUR reporter is sourced from the City and County of San Francisco. \u003ccite>(Courtesy of SPUR)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>Officials are now turning to concrete buildings and requiring owners to self-report to staff by June 2027. The thousands of commercial, government, industrial and multi-family buildings are scattered throughout the city, but a concentrated block is in downtown.\u003c/p>\n\u003cp>On the emergency services side, Carroll’s team is modernizing the city’s earthquake plan, transforming a big binder of scenarios into actionable lists that staff can also pull up on their phones during a disaster. The update is due by the end of the year.\u003c/p>\n\u003cp>Simultaneously, the city is asking voters to approve a \u003ca href=\"https://sfpublicworks.org/eser-2026#:~:text=The%20previous%20three%20ESER%20bonds,progress%20to%20protect%20San%20Francisco.\">$535 million bond\u003c/a> in June. The measure would fund seismic upgrades to fire stations, police stations, the 911 center, the \u003ca href=\"https://www.kqed.org/news/12060130/san-francisco-reveals-new-earthquake-firefighting-system-36-years-after-loma-prieta\">emergency firefighting water system\u003c/a>, and improvements to the bus system.\u003c/p>\n\u003cp>“We’ve touched every neighborhood in the city, and we still have a lot of work to do, which is why another bond is coming up,” said Brian Strong, the city’s chief resilience officer.\u003c/p>\n\u003cp>But there’s a new complication, he said. The city cannot rely on federal disaster aid under the Trump administration, and city budget constraints are limiting its office’s capacity to focus on seismic issues.\u003c/p>\n\u003cp>“We need to start making investments upfront so that when an earthquake happens, we don’t need to have that sort of high level of support from the federal government,” Strong said.\u003c/p>\n\u003ch2>‘It’s a known limitation of earthquake warning’\u003c/h2>\n\u003cp>Robert Olshansky remembers when there was no early earthquake warning system. Phones didn’t blare in the middle of the night, agencies didn’t text warnings.\u003c/p>\n\u003cp>Olshansky was rocked by a moderate-sized tremor in Southern California in 1971 and lived in North Berkeley during the Loma Prieta quake in 1989. By contrast, the 1906 quake released about 16 times as much energy as the Loma Prieta quake, according \u003ca href=\"https://earthquake.usgs.gov/earthquakes/events/1906calif/18april/got_seismogram_lp.php\">to the USGS\u003c/a>.\u003c/p>\n\u003cfigure id=\"attachment_12080163\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-12080163\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260413-SPUREARTHQUAKE-07-BL-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260413-SPUREARTHQUAKE-07-BL-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260413-SPUREARTHQUAKE-07-BL-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260413-SPUREARTHQUAKE-07-BL-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">The San Francisco Bay Area Planning and Urban Research Association (SPUR) offices in San Francisco on April 13, 2026. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>At the time, Olshansky was about to put his home on the market that weekend so he and his family could move out of state. When he got home early from work, the house began to shake. His impulse was to run out, but he froze and endured the shaking.\u003c/p>\n\u003cp>“I turned on the news to try and find out what happened, but it wasn’t clear at first,” Olshansky said. “There was the Bay Bridge, there was a fire in the Mission District. We were seeing all these bits of news.”\u003c/p>\n\u003cp>Today, systems like the MyShake app developed by UC Berkeley’s Seismology Lab can send alerts within seven seconds of a magnitude 4.5 earthquake or larger. But in the case of a “1906-type earthquake,” communities closest to the epicenter will likely get no warning, said Angie Lux, a project scientist for earthquake warning with the lab.[aside postID=news_11999982 hero='https://cdn.kqed.org/wp-content/uploads/sites/10/2024/08/MyShakeUCBerkeley-1020x679.jpg']“It’s a known limitation of earthquake warning, but I don’t think that it makes the system not useful,” Lux said. “Just having that warning means that people take action faster.”\u003c/p>\n\u003cp>But there might be another signal for some large quakes in Northern California. Chris Goldfinger, a marine geologist at Oregon State University, published a study last fall that found \u003ca href=\"https://pubs.geoscienceworld.org/gsa/geosphere/article/21/6/1132/661517/Unravelling-the-dance-of-earthquakes-Evidence-of?searchresult=1\">large earthquakes likely occurred in\u003c/a> sync along the West Coast’s two major faults — the San Andreas and the Cascadia Subduction Zone — over the past 3,000 years.\u003c/p>\n\u003cp>The faults rupturing together may produce “shaking that could actually be stronger than 1906,” and after the Cascadia moves, the San Andreas could follow within “minutes to hours to days” and up to 50 years, Goldfinger said.\u003c/p>\n\u003cp>“That would give you more than the few seconds that you’d get now from the early warning system we have,” Goldfinger said.\u003c/p>\n\u003cp>He said the Bay Area will eventually jolt harder than people have experienced in modern history.\u003c/p>\n\u003cp>“It’s definitely going to happen,” Goldfinger said. “It is just really a question of when and a question of how prepared we will be for it.”\u003c/p>\n\u003cp>[ad floatright]\u003c/p>\n",
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"title": "San Francisco’s Skyline Shines, but Earthquake Risk Remains 120 Years After 1906 | KQED",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003cp>\u003ca href=\"https://www.kqed.org/news/12069967/mayor-lurie-on-san-francisco-we-are-on-our-way-back-but-we-still-have-work-to-do\">San Franciscans\u003c/a> love to gather at Dolores Park to watch the skyline glow at sunset. The hard edges of the \u003ca href=\"https://www.kqed.org/news/11934056/the-transamerica-pyramid-at-50-from-architectural-butchery-to-icon\">Transamerica Pyramid\u003c/a> catch the light. Then the San Francisco Marriott Marquis, with its Art Deco-inspired windows, and finally, the spiraling silvery-grey of the Salesforce Tower.\u003c/p>\n\u003cp>But when Mary Ellen Carroll looks out at the skyline and rows of Victorian homes with soft-story ground floors, she’s filled with anxiety.\u003c/p>\n\u003cp>“I see all these people, all these buildings, and the extent of the need that could occur after a big earthquake,” said Carroll, executive director of the San Francisco Department of Emergency Management. “How many people are ready for that?”\u003c/p>\n\u003cp>\u003c/p>\u003c/div>",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003c/p>\n\u003cp>That “heavy responsibility” for Carroll shakes up every April 18, the anniversary of the \u003ca href=\"https://www.kqed.org/news/10930485/see-how-san-francisco-rebuilt-110-years-after-the-1906-quake\">1906 earthquake\u003c/a>. This year marks 120 years since the magnitude 7.9 rupture along the San Andreas fault roughly two miles offshore.\u003c/p>\n\u003cp>The quake and the fires that followed killed 3,000 people, leveled much of San Francisco and left more than half the \u003ca href=\"https://www.kqed.org/arts/13898345/the-1906-earthquake-survivor-who-fought-for-san-franciscos-homeless-population\">city’s residents unhoused\u003c/a>.\u003c/p>\n\u003cfigure id=\"attachment_12080164\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-12080164\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-01-BL-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-01-BL-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-01-BL-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-01-BL-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Mary Ellen Carroll, executive director of the San Francisco Department of Emergency Management, at her office in San Francisco City Hall on April 15, 2026. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>The anniversary reminds Carroll that the Bay Area remains extremely vulnerable.\u003c/p>\n\u003cp>There’s a 72% chance that a magnitude 6.7 earthquake or stronger will occur here in the next three decades, according to \u003ca href=\"https://www.usgs.gov/faqs/what-probability-earthquake-will-occur-los-angeles-area-san-francisco-bay-area#:~:text=San%20Francisco%20Bay%20area%3A,an%20earthquake%20measuring%20magnitude%207.5\">a 2014 analysis\u003c/a> from the United States Geological Survey.\u003c/p>\n\u003cp>When the earth shakes wildly again, it will do so in a Bay Area transformed from 1906, now home to a population more than 10 times larger.\u003c/p>\n\u003cfigure id=\"attachment_12080264\" class=\"wp-caption aligncenter\" style=\"max-width: 1973px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-12080264\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/240416-1906-san-francisco-KQED.jpg\" alt=\"\" width=\"1973\" height=\"1424\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/240416-1906-san-francisco-KQED.jpg 1973w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/240416-1906-san-francisco-KQED-160x115.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/240416-1906-san-francisco-KQED-1536x1109.jpg 1536w\" sizes=\"auto, (max-width: 1973px) 100vw, 1973px\">\u003cfigcaption class=\"wp-caption-text\">This photograph, taken by George Lawrence from a series of kites five weeks after the great earthquake of April 18, 1906, shows the devastation brought on the city of San Francisco by the quake and subsequent fire. The view is looking over Nob Hill toward the business district, South of the Slot, and the distant Mission. The Fairmont Hotel, far left. dwarfs the Call Building. \u003ccite>(Courtesy of Harry Myers)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>San Francisco spent more than $20 billion on seismic upgrades over the past several decades. The money went to \u003ca href=\"https://data.sfgov.org/Housing-and-Buildings/Map-of-Soft-Story-Properties/jwdp-cqyc\">retrofitting older brick and wood buildings\u003c/a>, seismic improvements to infrastructure, constructing new, safe hospitals, police and fire stations and strengthening emergency response systems.\u003c/p>\n\u003cp>But a \u003ca href=\"https://www.spur.org/publications/policy-brief/2026-04-09/120-years-after-1906\">new policy brief from the Bay Area think tank SPUR\u003c/a> warns that more than 3,700 pre-1995 concrete buildings — concentrated downtown — could face significant risk, and some fire hazards have gone unaddressed.\u003c/p>\n\u003cp>“There would definitely be buildings that could collapse,” said Sarah Atkinson, author of the report.\u003c/p>\n\u003cfigure id=\"attachment_12080162\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-12080162\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260413-SPUREARTHQUAKE-03-BL-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260413-SPUREARTHQUAKE-03-BL-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260413-SPUREARTHQUAKE-03-BL-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260413-SPUREARTHQUAKE-03-BL-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Sarah Atkinson, a hazard resilience senior policy manager at the San Francisco Bay Area Planning and Urban Research Association (SPUR), at the organization’s offices in San Francisco on April 13, 2026. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>The state has significantly improved its early warning system, too. While phone applications and alerts give people an \u003ca href=\"https://www.kqed.org/science/2000568/after-4-6-earthquake-jolts-santa-cruz-seismologists-double-down-on-myshake-alerts\">extra moment to drop and hold on\u003c/a>, they do little to improve a building’s seismic safety. Some researchers point to evidence that a much larger earthquake than the 1906 quake could shake the Bay Area.\u003c/p>\n\u003cp>Carroll said most San Franciscans cannot grasp what a colossal rattling will feel like.\u003c/p>\n\u003cp>“It’s going to take an earthquake for us to take an earthquake seriously,” Carroll said. “There will be catastrophic damage. It will interrupt the economy, likely take lives, and we’ll take considerable time to recover.”\u003c/p>\n\u003ch2>‘A big earthquake can happen again’\u003c/h2>\n\u003cp>Predicting where the next damaging Bay Area earthquake isn’t an exact science. Seismologists know a lot about faults: their general size, stress and history. But scientists can’t tell exactly when or where a rupture will occur.\u003c/p>\n\u003cp>Beneath the region, there lie many medium- to large-faults, including the San Andreas and Hayward faults, as well as many smaller fissures. Evan Hirakawa, a USGS research geophysicist, said seismologists are watching the Hayward Fault, which runs beneath the East Bay Hills, because it has the highest likelihood of a major earthquake.\u003c/p>\n\u003cp>The San Andreas has a lower probability because it experienced an intense quake a little more than a century ago, which is “recently” in geologic time.\u003c/p>\n\u003cfigure id=\"attachment_12080165\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-12080165\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-02-BL-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-02-BL-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-02-BL-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260415-SPUREARTHQUAKE-02-BL-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">A view of high-rises in downtown San Francisco from Salesforce Park on April 15, 2026. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>But an impressive quake could also happen on a separate fracture.\u003c/p>\n\u003cp>“We see these old black and white pictures of people in 1906, dealing with the rubble, but in some ways [the next big quake] might not be that different,” Hirakawa said. “People should know that a big earthquake can happen again.”\u003c/p>\n\u003cp>Stephen Sherman Wade was 8 years old and living in Southern California when the 1994 Northridge earthquake shook his family’s home for more than 20 seconds.\u003c/p>\n\u003cp>“Beds shuddered against the wall,” Wade said. “It was terrifying.”\u003c/p>\n\u003cp>After moving to San Francisco’s SoMa neighborhood in 2020, he made it a priority to find a home that was seismically safe.\u003c/p>\n\u003cp>“No building is ever going to be 100% structurally sound against an earthquake,” Wade said, “but you can build pretty well for it.”\u003c/p>\n\u003ch2>‘We still have a lot of work to do’\u003c/h2>\n\u003cp>San Francisco’s earthquake dilemma is long-standing. The SPUR brief states that 60% of the city’s buildings were constructed prior to 1940, “without consideration for modern earthquake codes.”\u003c/p>\n\u003cp>Many are made of concrete, and in previous quakes elsewhere, similar buildings “pancaked on themselves,” causing “a lot of deaths,” Atkinson said.\u003c/p>\n\u003cp>In 1992, San Francisco developed a seismic hazard rating system to assess more than 200 city-owned buildings, using a 1-to-4 scale (best to worst). The city is still \u003ca href=\"https://onesanfrancisco.org/the-plan-2018/building-our-future-earthquakes#:~:text=Seismic%20Hazard%20Ratings%20(SHRs)%20were,prioritization%20of%20seismically%20vulnerable%20structures.\">working to address\u003c/a> many at-risk buildings.\u003c/p>\n\u003cfigure id=\"attachment_12080328\" class=\"wp-caption alignleft\" style=\"max-width: 1212px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-12080328\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260416-SPUR-Map-KQED.png\" alt=\"\" width=\"1212\" height=\"820\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260416-SPUR-Map-KQED.png 1212w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260416-SPUR-Map-KQED-160x108.png 160w\" sizes=\"auto, (max-width: 1212px) 100vw, 1212px\">\u003cfigcaption class=\"wp-caption-text\">A new policy brief from the Bay Area think tank SPUR warns that more than 3,700 pre-1995 concrete buildings could face significant risk if a large earthquake were to occur near San Francisco. The map highlighted in the SPUR reporter is sourced from the City and County of San Francisco. \u003ccite>(Courtesy of SPUR)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>Officials are now turning to concrete buildings and requiring owners to self-report to staff by June 2027. The thousands of commercial, government, industrial and multi-family buildings are scattered throughout the city, but a concentrated block is in downtown.\u003c/p>\n\u003cp>On the emergency services side, Carroll’s team is modernizing the city’s earthquake plan, transforming a big binder of scenarios into actionable lists that staff can also pull up on their phones during a disaster. The update is due by the end of the year.\u003c/p>\n\u003cp>Simultaneously, the city is asking voters to approve a \u003ca href=\"https://sfpublicworks.org/eser-2026#:~:text=The%20previous%20three%20ESER%20bonds,progress%20to%20protect%20San%20Francisco.\">$535 million bond\u003c/a> in June. The measure would fund seismic upgrades to fire stations, police stations, the 911 center, the \u003ca href=\"https://www.kqed.org/news/12060130/san-francisco-reveals-new-earthquake-firefighting-system-36-years-after-loma-prieta\">emergency firefighting water system\u003c/a>, and improvements to the bus system.\u003c/p>\n\u003cp>“We’ve touched every neighborhood in the city, and we still have a lot of work to do, which is why another bond is coming up,” said Brian Strong, the city’s chief resilience officer.\u003c/p>\n\u003cp>But there’s a new complication, he said. The city cannot rely on federal disaster aid under the Trump administration, and city budget constraints are limiting its office’s capacity to focus on seismic issues.\u003c/p>\n\u003cp>“We need to start making investments upfront so that when an earthquake happens, we don’t need to have that sort of high level of support from the federal government,” Strong said.\u003c/p>\n\u003ch2>‘It’s a known limitation of earthquake warning’\u003c/h2>\n\u003cp>Robert Olshansky remembers when there was no early earthquake warning system. Phones didn’t blare in the middle of the night, agencies didn’t text warnings.\u003c/p>\n\u003cp>Olshansky was rocked by a moderate-sized tremor in Southern California in 1971 and lived in North Berkeley during the Loma Prieta quake in 1989. By contrast, the 1906 quake released about 16 times as much energy as the Loma Prieta quake, according \u003ca href=\"https://earthquake.usgs.gov/earthquakes/events/1906calif/18april/got_seismogram_lp.php\">to the USGS\u003c/a>.\u003c/p>\n\u003cfigure id=\"attachment_12080163\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-12080163\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260413-SPUREARTHQUAKE-07-BL-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260413-SPUREARTHQUAKE-07-BL-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260413-SPUREARTHQUAKE-07-BL-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/04/260413-SPUREARTHQUAKE-07-BL-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">The San Francisco Bay Area Planning and Urban Research Association (SPUR) offices in San Francisco on April 13, 2026. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>At the time, Olshansky was about to put his home on the market that weekend so he and his family could move out of state. When he got home early from work, the house began to shake. His impulse was to run out, but he froze and endured the shaking.\u003c/p>\n\u003cp>“I turned on the news to try and find out what happened, but it wasn’t clear at first,” Olshansky said. “There was the Bay Bridge, there was a fire in the Mission District. We were seeing all these bits of news.”\u003c/p>\n\u003cp>Today, systems like the MyShake app developed by UC Berkeley’s Seismology Lab can send alerts within seven seconds of a magnitude 4.5 earthquake or larger. But in the case of a “1906-type earthquake,” communities closest to the epicenter will likely get no warning, said Angie Lux, a project scientist for earthquake warning with the lab.\u003c/p>\u003c/div>",
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"content": "\u003cdiv class=\"post-body\">\u003cp>“It’s a known limitation of earthquake warning, but I don’t think that it makes the system not useful,” Lux said. “Just having that warning means that people take action faster.”\u003c/p>\n\u003cp>But there might be another signal for some large quakes in Northern California. Chris Goldfinger, a marine geologist at Oregon State University, published a study last fall that found \u003ca href=\"https://pubs.geoscienceworld.org/gsa/geosphere/article/21/6/1132/661517/Unravelling-the-dance-of-earthquakes-Evidence-of?searchresult=1\">large earthquakes likely occurred in\u003c/a> sync along the West Coast’s two major faults — the San Andreas and the Cascadia Subduction Zone — over the past 3,000 years.\u003c/p>\n\u003cp>The faults rupturing together may produce “shaking that could actually be stronger than 1906,” and after the Cascadia moves, the San Andreas could follow within “minutes to hours to days” and up to 50 years, Goldfinger said.\u003c/p>\n\u003cp>“That would give you more than the few seconds that you’d get now from the early warning system we have,” Goldfinger said.\u003c/p>\n\u003cp>He said the Bay Area will eventually jolt harder than people have experienced in modern history.\u003c/p>\n\u003cp>“It’s definitely going to happen,” Goldfinger said. “It is just really a question of when and a question of how prepared we will be for it.”\u003c/p>\n\u003cp>\u003c/p>\u003c/div>",
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"title": "4.6 Magnitude Earthquake in Santa Cruz Mountains Shakes Bay Area Awake",
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"content": "\u003cp>Bay Area residents were jolted awake by a magnitude 4.6 \u003ca href=\"https://www.kqed.org/earthquakes\">earthquake\u003c/a> early Thursday morning.\u003c/p>\n\u003cp>The U.S. Geological Survey reported the quake, which was centered about a mile from Boulder Creek in the Santa Cruz Mountains, around 1:40 a.m.\u003c/p>\n\u003cp>South Bay residents reported feeling the strongest tremors, with some saying they felt a sharp jolt followed by about 30 seconds of rolling and shaking. Across the Bay Area, the quake’s impacts were felt in San Francisco and Oakland, and as far north as Santa Rosa.\u003c/p>\n\u003cp>[ad fullwidth]\u003c/p>\n\u003cp>It was originally recorded as a magnitude of 5.1, but was downgraded to 4.6 by the USGS.\u003c/p>\n\u003cp>Early reports indicated little damage and no injuries as a result.[aside postID=news_11999982 hero='https://cdn.kqed.org/wp-content/uploads/sites/10/2024/08/MyShakeUCBerkeley-1020x679.jpg']It’s not clear what fault the quake occurred on. The San Andreas Fault, which caused the 1989 Loma Prieta earthquake, and the Hayward Fault, which has spurred multiple smaller seismic events over the last year, both run through the area.\u003c/p>\n\u003cp>As of 8 a.m., no significant aftershocks have been reported. While any earthquake can be a foreshock of a larger one to come, the likelihood is generally quite low.\u003c/p>\n\u003cp>According to USGS, there’s about a 25% chance of a magnitude 3.0 or greater quake in the next week, but the likelihood of a stronger 4.0 magnitude quake in that time drops to just 3%.\u003c/p>\n\u003cp>\u003c/p>\n",
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"excerpt": "According to the U.S. Geological Survey, the tremors mean there’s about a 25% chance of another magnitude 3.0 or greater quake in the next week.",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003cp>Bay Area residents were jolted awake by a magnitude 4.6 \u003ca href=\"https://www.kqed.org/earthquakes\">earthquake\u003c/a> early Thursday morning.\u003c/p>\n\u003cp>The U.S. Geological Survey reported the quake, which was centered about a mile from Boulder Creek in the Santa Cruz Mountains, around 1:40 a.m.\u003c/p>\n\u003cp>South Bay residents reported feeling the strongest tremors, with some saying they felt a sharp jolt followed by about 30 seconds of rolling and shaking. Across the Bay Area, the quake’s impacts were felt in San Francisco and Oakland, and as far north as Santa Rosa.\u003c/p>\n\u003cp>\u003c/p>\u003c/div>",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003c/p>\n\u003cp>It was originally recorded as a magnitude of 5.1, but was downgraded to 4.6 by the USGS.\u003c/p>\n\u003cp>Early reports indicated little damage and no injuries as a result.\u003c/p>\u003c/div>",
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"content": "\u003cdiv class=\"post-body\">\u003cp>It’s not clear what fault the quake occurred on. The San Andreas Fault, which caused the 1989 Loma Prieta earthquake, and the Hayward Fault, which has spurred multiple smaller seismic events over the last year, both run through the area.\u003c/p>\n\u003cp>As of 8 a.m., no significant aftershocks have been reported. While any earthquake can be a foreshock of a larger one to come, the likelihood is generally quite low.\u003c/p>\n\u003cp>According to USGS, there’s about a 25% chance of a magnitude 3.0 or greater quake in the next week, but the likelihood of a stronger 4.0 magnitude quake in that time drops to just 3%.\u003c/p>\n\u003cp>\u003c/p>\n\u003c/div>\u003c/p>",
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"slug": "after-4-6-earthquake-jolts-santa-cruz-seismologists-double-down-on-myshake-alerts",
"title": "After 4.6 Earthquake Jolts Santa Cruz, Seismologists Double Down on MyShake Alerts",
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"content": "\u003cp>A blaring alarm woke Cian Dawson early Thursday morning. It was the MyShake phone app, alerting him to a 5.1 magnitude \u003ca href=\"https://www.kqed.org/news/12078438/4-6-magnitude-earthquake-in-santa-cruz-mountains-shakes-bay-area-awake\">earthquake\u003c/a> about to rock the region.\u003c/p>\n\u003cp>Dawson stayed in bed, thinking he wouldn’t have enough time to get under a table.\u003c/p>\n\u003cp>A few seconds later, the Berkeley resident’s room began to shake. “It made more sense to me to stay where I was,” Dawson told KQED.\u003c/p>\n\u003cp>The tremor \u003ca href=\"https://earthquake.usgs.gov/earthquakes/eventpage/nc75337442/dyfi/responses\">near Boulder Creek\u003c/a> prompted the \u003ca href=\"https://myshake.berkeley.edu/\">MyShake phone app\u003c/a> and local agencies to alert hundreds of thousands of residents across the greater Bay Area and Central Coast. The USGS later downgraded the quake to a 4.6. More than 10,000 people reported the quake in the app, saying they felt light to moderate shaking, and there were two reports of destroyed buildings.\u003c/p>\n\u003cp>[ad fullwidth]\u003c/p>\n\u003cp>In light of the relatively moderate-sized quake and a \u003ca href=\"https://www.kqed.org/news/12066087/the-m5-9-earthquake-alert-that-startled-the-bay-area-this-morning-was-a-false-alarm\">false alarm issued by the app\u003c/a> last year, some Bay Area residents have questioned whether agencies issue too many warnings and whether these alerts really make us safer. But seismologists argue they are important for protecting the public in the long run.\u003c/p>\n\u003cp>Dawson said there needs to be more outreach about how seriously to take the messaging, because people are beginning to train themselves to ignore the alerts.\u003c/p>\n\u003cp>“The ‘boy who cries wolf’ is a great way to describe people’s response when they don’t understand what the alert actually means,” Dawson said.\u003c/p>\n\u003cfigure id=\"attachment_2000581\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"wp-image-2000581 size-full\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/BoulderCreekSantaCruzGetty.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/BoulderCreekSantaCruzGetty.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/BoulderCreekSantaCruzGetty-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/BoulderCreekSantaCruzGetty-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/BoulderCreekSantaCruzGetty-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Big Basin Redwoods State Park on Nov. 5, 2020. \u003ccite>(Carolyn Cole/Los Angeles Times via Getty Images)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>Angie Lux, a scientist specializing in earthquake early warnings at the UC Berkeley Seismological Laboratory, said she thought the alert worked well, as it reached its ultimate goal of protecting lives and reducing injuries. Lux said the alert is sent to everyone at once, and the further you are away from the epicenter, the longer you will have to act.\u003c/p>\n\u003cp>“For the people that are right next to the epicenter, they’re not going to receive much warning,” Lux said.\u003c/p>\n\u003cp>Evan Hirakawa lives in Scott’s Valley, just a few miles away from the source of Thursday’s quake. The USGS research geophysicist said he felt the quake first, then his phone pinged.[aside postID=news_11999982 hero='https://cdn.kqed.org/wp-content/uploads/sites/10/2024/08/MyShakeUCBerkeley-1020x679.jpg']“It was pretty intense at my house,” Hirakawa said. “The shake alert kind of worked, but it was too close for it to really benefit me.”\u003c/p>\n\u003cp>Hirakawa said there’s evidence that indicates the earthquake likely took place on a fault that hasn’t ruptured in a long time — the Zayante Fault in Santa Cruz County, which sits roughly between two major fault systems: the San Andreas and the San Gregorio.\u003c/p>\n\u003cp>“We have [Zayante] labeled in our databases as maybe it’s inactive now,” Hirakawa said. “It was active thousands of years ago, but we haven’t seen a lot of historical earthquakes on it.\u003cem>”\u003c/em>\u003c/p>\n\u003cp>While this shaking may seem like an outlier, Hirakawa said he doesn’t think Thursday’s quake “is a foreshock to something bigger.” But, he said, it’s still worth paying attention to early warning messages, because doing so might just be “life-saving.”\u003c/p>\n\u003cp>“The fact that so many people who felt the earthquake got the alert this morning is a good sign that the early warning stuff is at least working,” Hirakwa said. “It will be unfortunate when it happens, but the system will only be tested when there’s a large, destructive earthquake. That’s when it’s going to matter.”\u003c/p>\n\u003cp>San Francisco resident Anthony Costello slept through the alert but woke to the jostling.\u003c/p>\n\u003cp>“I was just like, ‘Oh, girl, shut up, and just rolled over,’” Costello said, who has lived in the region for eight years. “I think my sensitivity to quakes is starting to increase a little bit and also my general anxiety with quakes.”\u003c/p>\n\u003cfigure id=\"attachment_524199\" class=\"wp-caption aligncenter\" style=\"max-width: 1373px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"wp-image-524199 size-full\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2016/02/MyShake_scrgrab_featured.png\" alt=\"U.C. Berkeley's MyShake app could be the first step toward earthquake warnings on your phone.\" width=\"1373\" height=\"795\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2016/02/MyShake_scrgrab_featured.png 1373w, https://cdn.kqed.org/wp-content/uploads/sites/35/2016/02/MyShake_scrgrab_featured-400x232.png 400w, https://cdn.kqed.org/wp-content/uploads/sites/35/2016/02/MyShake_scrgrab_featured-800x463.png 800w, https://cdn.kqed.org/wp-content/uploads/sites/35/2016/02/MyShake_scrgrab_featured-768x445.png 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2016/02/MyShake_scrgrab_featured-1180x683.png 1180w, https://cdn.kqed.org/wp-content/uploads/sites/35/2016/02/MyShake_scrgrab_featured-960x556.png 960w\" sizes=\"auto, (max-width: 1373px) 100vw, 1373px\">\u003cfigcaption class=\"wp-caption-text\">MyShake alerts users to earthquakes of magnitude 4.5 or higher, though residents in places like San Ramon have reported feeling smaller quakes during a swarm that has persisted for months. \u003ccite>(Berkeley Seismological Laboratory)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>Even still, Costello said early warnings are so important because the larger the quake, the more time you’re going to need to make sure you’re safe.\u003c/p>\n\u003cp>Menlo Park resident Stephanie Lucianovic also went back to sleep after a local warning prompted her phone to go off. In the morning, she discussed the quakes with her kids. She’s considering downloading the MyShake app, she said.\u003c/p>\n\u003cp>“I’m interested in knowing all the information, but I don’t think I’d want to have it be a loud warning every time there was some minor earthquake,” Lucianovic said.\u003c/p>\n\u003cp>Luckily, MyShake alerts users when there’s a 4.5-magnitude earthquake or higher, which doesn’t discount the experience of people who feel smaller quakes, like in \u003ca href=\"https://www.kqed.org/science/2000505/new-web-of-sensors-aims-to-pinpoint-san-ramon-earthquake-source\">San Ramon\u003c/a>, where a swarm of smaller quakes has been occurring for months.\u003c/p>\n\u003cp>“We can’t make everybody happy,” Lux said. “Some people are going to feel it, some people may not, but we’re there to help.”\u003c/p>\n\u003cp>https://docs.google.com/forms/d/e/1FAIpQLSeeeKhyuk-_odJH80iw5eAlpLBF-YWJnOi_Yqs4BEN9fY1YJA/viewform?usp=publish-editor\u003c/p>\n\u003cp>\u003c/p>\n",
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"excerpt": "A 4.6 magnitude earthquake near Boulder Creek prompted alerts across Northern California, but mixed reactions reveal skepticism about early warning systems.\r\n",
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"title": "After 4.6 Earthquake Jolts Santa Cruz, Seismologists Double Down on MyShake Alerts | KQED",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003cp>A blaring alarm woke Cian Dawson early Thursday morning. It was the MyShake phone app, alerting him to a 5.1 magnitude \u003ca href=\"https://www.kqed.org/news/12078438/4-6-magnitude-earthquake-in-santa-cruz-mountains-shakes-bay-area-awake\">earthquake\u003c/a> about to rock the region.\u003c/p>\n\u003cp>Dawson stayed in bed, thinking he wouldn’t have enough time to get under a table.\u003c/p>\n\u003cp>A few seconds later, the Berkeley resident’s room began to shake. “It made more sense to me to stay where I was,” Dawson told KQED.\u003c/p>\n\u003cp>The tremor \u003ca href=\"https://earthquake.usgs.gov/earthquakes/eventpage/nc75337442/dyfi/responses\">near Boulder Creek\u003c/a> prompted the \u003ca href=\"https://myshake.berkeley.edu/\">MyShake phone app\u003c/a> and local agencies to alert hundreds of thousands of residents across the greater Bay Area and Central Coast. The USGS later downgraded the quake to a 4.6. More than 10,000 people reported the quake in the app, saying they felt light to moderate shaking, and there were two reports of destroyed buildings.\u003c/p>\n\u003cp>\u003c/p>\u003c/div>",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003c/p>\n\u003cp>In light of the relatively moderate-sized quake and a \u003ca href=\"https://www.kqed.org/news/12066087/the-m5-9-earthquake-alert-that-startled-the-bay-area-this-morning-was-a-false-alarm\">false alarm issued by the app\u003c/a> last year, some Bay Area residents have questioned whether agencies issue too many warnings and whether these alerts really make us safer. But seismologists argue they are important for protecting the public in the long run.\u003c/p>\n\u003cp>Dawson said there needs to be more outreach about how seriously to take the messaging, because people are beginning to train themselves to ignore the alerts.\u003c/p>\n\u003cp>“The ‘boy who cries wolf’ is a great way to describe people’s response when they don’t understand what the alert actually means,” Dawson said.\u003c/p>\n\u003cfigure id=\"attachment_2000581\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"wp-image-2000581 size-full\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/BoulderCreekSantaCruzGetty.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/BoulderCreekSantaCruzGetty.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/BoulderCreekSantaCruzGetty-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/BoulderCreekSantaCruzGetty-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/04/BoulderCreekSantaCruzGetty-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Big Basin Redwoods State Park on Nov. 5, 2020. \u003ccite>(Carolyn Cole/Los Angeles Times via Getty Images)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>Angie Lux, a scientist specializing in earthquake early warnings at the UC Berkeley Seismological Laboratory, said she thought the alert worked well, as it reached its ultimate goal of protecting lives and reducing injuries. Lux said the alert is sent to everyone at once, and the further you are away from the epicenter, the longer you will have to act.\u003c/p>\n\u003cp>“For the people that are right next to the epicenter, they’re not going to receive much warning,” Lux said.\u003c/p>\n\u003cp>Evan Hirakawa lives in Scott’s Valley, just a few miles away from the source of Thursday’s quake. The USGS research geophysicist said he felt the quake first, then his phone pinged.\u003c/p>\u003c/div>",
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"content": "\u003cdiv class=\"post-body\">\u003cp>“It was pretty intense at my house,” Hirakawa said. “The shake alert kind of worked, but it was too close for it to really benefit me.”\u003c/p>\n\u003cp>Hirakawa said there’s evidence that indicates the earthquake likely took place on a fault that hasn’t ruptured in a long time — the Zayante Fault in Santa Cruz County, which sits roughly between two major fault systems: the San Andreas and the San Gregorio.\u003c/p>\n\u003cp>“We have [Zayante] labeled in our databases as maybe it’s inactive now,” Hirakawa said. “It was active thousands of years ago, but we haven’t seen a lot of historical earthquakes on it.\u003cem>”\u003c/em>\u003c/p>\n\u003cp>While this shaking may seem like an outlier, Hirakawa said he doesn’t think Thursday’s quake “is a foreshock to something bigger.” But, he said, it’s still worth paying attention to early warning messages, because doing so might just be “life-saving.”\u003c/p>\n\u003cp>“The fact that so many people who felt the earthquake got the alert this morning is a good sign that the early warning stuff is at least working,” Hirakwa said. “It will be unfortunate when it happens, but the system will only be tested when there’s a large, destructive earthquake. That’s when it’s going to matter.”\u003c/p>\n\u003cp>San Francisco resident Anthony Costello slept through the alert but woke to the jostling.\u003c/p>\n\u003cp>“I was just like, ‘Oh, girl, shut up, and just rolled over,’” Costello said, who has lived in the region for eight years. “I think my sensitivity to quakes is starting to increase a little bit and also my general anxiety with quakes.”\u003c/p>\n\u003cfigure id=\"attachment_524199\" class=\"wp-caption aligncenter\" style=\"max-width: 1373px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"wp-image-524199 size-full\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2016/02/MyShake_scrgrab_featured.png\" alt=\"U.C. Berkeley's MyShake app could be the first step toward earthquake warnings on your phone.\" width=\"1373\" height=\"795\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2016/02/MyShake_scrgrab_featured.png 1373w, https://cdn.kqed.org/wp-content/uploads/sites/35/2016/02/MyShake_scrgrab_featured-400x232.png 400w, https://cdn.kqed.org/wp-content/uploads/sites/35/2016/02/MyShake_scrgrab_featured-800x463.png 800w, https://cdn.kqed.org/wp-content/uploads/sites/35/2016/02/MyShake_scrgrab_featured-768x445.png 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2016/02/MyShake_scrgrab_featured-1180x683.png 1180w, https://cdn.kqed.org/wp-content/uploads/sites/35/2016/02/MyShake_scrgrab_featured-960x556.png 960w\" sizes=\"auto, (max-width: 1373px) 100vw, 1373px\">\u003cfigcaption class=\"wp-caption-text\">MyShake alerts users to earthquakes of magnitude 4.5 or higher, though residents in places like San Ramon have reported feeling smaller quakes during a swarm that has persisted for months. \u003ccite>(Berkeley Seismological Laboratory)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>Even still, Costello said early warnings are so important because the larger the quake, the more time you’re going to need to make sure you’re safe.\u003c/p>\n\u003cp>Menlo Park resident Stephanie Lucianovic also went back to sleep after a local warning prompted her phone to go off. In the morning, she discussed the quakes with her kids. She’s considering downloading the MyShake app, she said.\u003c/p>\n\u003cp>“I’m interested in knowing all the information, but I don’t think I’d want to have it be a loud warning every time there was some minor earthquake,” Lucianovic said.\u003c/p>\n\u003cp>Luckily, MyShake alerts users when there’s a 4.5-magnitude earthquake or higher, which doesn’t discount the experience of people who feel smaller quakes, like in \u003ca href=\"https://www.kqed.org/science/2000505/new-web-of-sensors-aims-to-pinpoint-san-ramon-earthquake-source\">San Ramon\u003c/a>, where a swarm of smaller quakes has been occurring for months.\u003c/p>\n\u003cp>“We can’t make everybody happy,” Lux said. “Some people are going to feel it, some people may not, but we’re there to help.”\u003c/p>\u003c/p>\u003cp>\u003cdiv class='utils-parseShortcode-shortcodes-__shortcodes__shortcodeWrapper'>\n \u003ciframe\n src='https://docs.google.com/forms/d/e/1FAIpQLSeeeKhyuk-_odJH80iw5eAlpLBF-YWJnOi_Yqs4BEN9fY1YJA/viewform?usp=publish-editor?embedded=true'\n title='https://docs.google.com/forms/d/e/1FAIpQLSeeeKhyuk-_odJH80iw5eAlpLBF-YWJnOi_Yqs4BEN9fY1YJA/viewform?usp=publish-editor'\n width='760' height='500'\n frameborder='0'\n marginheight='0' marginwidth='0'>\u003c/iframe>\u003c/div>\u003c/p>\u003cp>\u003cp>\u003c/p>\n\u003c/div>\u003c/p>",
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"title": "What’s Causing Hundreds of San Ramon Earthquakes? New Sensors Seek Answers",
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"content": "\u003cp>Mona Epstein thought the violent shaking that woke her was just a nightmare. But when she checked her phone, she saw that an \u003ca href=\"https://earthquake.usgs.gov/earthquakes/eventpage/nc75331762/executive\">earthquake \u003c/a>had struck the San Ramon Valley.\u003c/p>\n\u003cp>“Earthquakes have infiltrated my dreams,” Epstein said. “It’s really nerve-wracking.”\u003c/p>\n\u003cp>Epstein lives in \u003ca href=\"https://www.kqed.org/science/1999633/scientists-say-san-ramons-latest-earthquake-swarm-is-normal-but-residents-are-on-edge\">San Ramon\u003c/a>, a typically quiet Bay Area suburb that has been jolted by 162 earthquakes of a magnitude 2.0 or higher since November. Three dozen small tremors shook her home \u003ca href=\"https://www.kqed.org/news/12071884/earthquake-swarm-in-san-ramon-is-felt-around-bay-area-with-over-20-small-quakes\">in early February\u003c/a>, popping open cabinet doors.\u003c/p>\n\u003cp>“It just won’t stop,” Epstein said. “It’s like the new normal, I’ve become accustomed to it.”\u003c/p>\n\u003cp>[ad fullwidth]\u003c/p>\n\u003cp>Seismologists call the sequence of small earthquakes a “swarm” and say it is normal for this part of the Bay Area, which lies atop a spiderweb of active faults.\u003c/p>\n\u003cp>They don’t know exactly how or why they’re happening, or whether they are occurring on a major fault — which may hint at the risk of a larger earthquake coming — or on one of the many smaller cracks nearby.\u003c/p>\n\u003cfigure id=\"attachment_2000504\" class=\"wp-caption aligncenter\" style=\"max-width: 2560px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2000504\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/faults-5.jpg\" alt=\"\" width=\"2560\" height=\"1920\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/faults-5.jpg 2560w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/faults-5-2000x1500.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/faults-5-160x120.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/faults-5-768x576.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/faults-5-1536x1152.jpg 1536w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/faults-5-2048x1536.jpg 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\">\u003cfigcaption class=\"wp-caption-text\">San Ramon sits atop a complex network of faults, making it prone to earthquake swarms. \u003ccite>(Anna Vignet/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>That’s why in mid-March, a group of United States Geological Survey seismologists and volunteers buried a network of 78 blue and grey toaster-sized seismometers across San Ramon and Danville.\u003c/p>\n\u003cp>“I don’t have any preconceived notions, I just want to find out what’s going on,” said Rufus Catchings, a research geophysicist with USGS, who is leading the work. “The data will hopefully tell us a lot more detail, like which faults are involved and whether earthquakes are happening on major faults.”\u003c/p>\n\u003cp>Catchings said a swarm on a smaller fault is “unlikely to generate a very large earthquake. But if it is connected, say, to the Calaveras or to one of the thrust faults, it could be very significant, and we need to know that.”\u003c/p>\n\u003cfigure id=\"attachment_2000437\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2000437\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00566_TV-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00566_TV-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00566_TV-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00566_TV-KQED-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00566_TV-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Rufus Catchings, a seismologist from USGS, installs a seismometer at a home in San Ramon on March 17, 2026. \u003ccite>(Tâm Vũ/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>San Ramon sits in a part of Contra Costa County that is prone to swarms and has experienced them a handful of times since the 1970s due to a complex system of faults in the region, including the Calaveras, Concord-Green Valley, Pleasanton, Mt. Diablo Thrust, Greenville and Sherburne Hills Thrust.\u003c/p>\n\u003cp>Epstein has lived in San Ramon for 12 years and experienced multiple swarms. The latest quakes have left her with a mountain of unanswered questions.\u003c/p>\n\u003cp>“I read as much as I could to understand whether or not this means that [a big one] is coming,” Epstein said. “I don’t think there is any solid answer. That’s why they’re putting all those little sensors everywhere.”\u003c/p>\n\u003ch2>A web of sensors\u003c/h2>\n\u003cp>The grid of sensors will track movement underground for the next six months, and afterward, seismologists will dig them up and analyze their readings.\u003c/p>\n\u003cp>“We know for sure that we’re going to catch some really small earthquakes because they’re just going on all the time, and if the swarm does pick up again, then we’ll definitely catch that,” said Annemarie Baltay, a research geophysicist with USGS.\u003c/p>\n\u003cfigure id=\"attachment_2000438\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2000438\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00574_TV-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00574_TV-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00574_TV-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00574_TV-KQED-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00574_TV-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Annemarie Baltay (left), a geophysicist researcher from USGS, and Rufus Catchings (right), a seismologist from USGS, install a seismometer at a home in San Ramon on March 17, 2026. \u003ccite>(Tâm Vũ/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>The battery-operated seismometers gather data around 200 times per second, Catchings said.\u003c/p>\n\u003cp>“We know that eventually there’s gonna be a big earthquake here,” Catchings said. “You can look at these mountains and see how they popped up through the tectonic forces.”\u003c/p>\n\u003cp>The researchers theorize that the swarm occurred along smaller sub-faults or due to liquid moving around these marginal cracks. But it’s hard to know exactly what’s happening five to 10 miles underground, Baltay said.[aside postID=news_12071884 hero='https://cdn.kqed.org/wp-content/uploads/sites/10/2026/02/251215-EarthquakeSwarms-14-BL_qed.jpg']“It’s very likely that the fault goes down, turns, dips and moves around,” Baltay said. “This will help us sort of understand that fault structure at depth.”\u003c/p>\n\u003cp>Baltay said the findings could also show how different soils affect how waves travel through the earth. What researchers learn might require adjustments to the USGS’s National Seismic Hazard Model, which informs local building codes and insurance risk models.\u003c/p>\n\u003cp>Mark Armstrong, mayor of San Ramon, lives in a two-story home smack dab in the epicenter of the recent swarm of quakes. He said the shaking he feels is a reminder that he lives in earthquake country.\u003c/p>\n\u003cp>“A couple of earthquakes were literally in my backyard or across the street,” Armstrong said, recalling rumblings that shook pictures off his bookshelves. The USGS scientists installed a seismometer in his backyard. “There’s a little bit of excitement when you get one of the big ones.”\u003c/p>\n\u003cp>Armstrong said residents have one burning question: “When is it going to stop?”\u003c/p>\n\u003cp>Armstrong said the city is planning an emergency exercise with the American Red Cross, in collaboration with the City of Danville and Contra Costa County. The run-through will likely include activating an emergency operations center and shelters.\u003c/p>\n\u003cfigure id=\"attachment_2000436\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2000436\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00523_TV-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00523_TV-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00523_TV-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00523_TV-KQED-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00523_TV-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Rufus Catchings, a seismologist from USGS, installs a seismometer at a home in San Ramon on March 17, 2026. \u003ccite>(Tâm Vũ/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>USGS seismologists also buried a sensor in Gina Veazey’s front yard. The Danville resident can tell an earthquake is going to shake her home when her dog, Stinky, goes “absolutely crazy” and “jumps off the bed.”\u003c/p>\n\u003cp>“Then all of a sudden we feel the tremor, so she’s a good indicator that something’s coming,” Veazey said.\u003c/p>\n\u003cp>Every time Veazey hears the groan of an earthquake, and then the rock and sway that follow, it’s a reminder that “Mother Nature is telling us we just got to roll with the punches that she throws. That’s all we can do.”\u003c/p>\n\u003cp>https://docs.google.com/forms/d/e/1FAIpQLSeeeKhyuk-_odJH80iw5eAlpLBF-YWJnOi_Yqs4BEN9fY1YJA/viewform?usp=publish-editor\u003c/p>\n\u003cp>\u003c/p>\n",
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"excerpt": "Small earthquakes have rattled San Ramon regularly for months. Federal seismologists buried dozens of sensors this month to learn why.",
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"title": "What’s Causing Hundreds of San Ramon Earthquakes? New Sensors Seek Answers | KQED",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003cp>Mona Epstein thought the violent shaking that woke her was just a nightmare. But when she checked her phone, she saw that an \u003ca href=\"https://earthquake.usgs.gov/earthquakes/eventpage/nc75331762/executive\">earthquake \u003c/a>had struck the San Ramon Valley.\u003c/p>\n\u003cp>“Earthquakes have infiltrated my dreams,” Epstein said. “It’s really nerve-wracking.”\u003c/p>\n\u003cp>Epstein lives in \u003ca href=\"https://www.kqed.org/science/1999633/scientists-say-san-ramons-latest-earthquake-swarm-is-normal-but-residents-are-on-edge\">San Ramon\u003c/a>, a typically quiet Bay Area suburb that has been jolted by 162 earthquakes of a magnitude 2.0 or higher since November. Three dozen small tremors shook her home \u003ca href=\"https://www.kqed.org/news/12071884/earthquake-swarm-in-san-ramon-is-felt-around-bay-area-with-over-20-small-quakes\">in early February\u003c/a>, popping open cabinet doors.\u003c/p>\n\u003cp>“It just won’t stop,” Epstein said. “It’s like the new normal, I’ve become accustomed to it.”\u003c/p>\n\u003cp>\u003c/p>\u003c/div>",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003c/p>\n\u003cp>Seismologists call the sequence of small earthquakes a “swarm” and say it is normal for this part of the Bay Area, which lies atop a spiderweb of active faults.\u003c/p>\n\u003cp>They don’t know exactly how or why they’re happening, or whether they are occurring on a major fault — which may hint at the risk of a larger earthquake coming — or on one of the many smaller cracks nearby.\u003c/p>\n\u003cfigure id=\"attachment_2000504\" class=\"wp-caption aligncenter\" style=\"max-width: 2560px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2000504\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/faults-5.jpg\" alt=\"\" width=\"2560\" height=\"1920\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/faults-5.jpg 2560w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/faults-5-2000x1500.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/faults-5-160x120.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/faults-5-768x576.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/faults-5-1536x1152.jpg 1536w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/faults-5-2048x1536.jpg 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\">\u003cfigcaption class=\"wp-caption-text\">San Ramon sits atop a complex network of faults, making it prone to earthquake swarms. \u003ccite>(Anna Vignet/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>That’s why in mid-March, a group of United States Geological Survey seismologists and volunteers buried a network of 78 blue and grey toaster-sized seismometers across San Ramon and Danville.\u003c/p>\n\u003cp>“I don’t have any preconceived notions, I just want to find out what’s going on,” said Rufus Catchings, a research geophysicist with USGS, who is leading the work. “The data will hopefully tell us a lot more detail, like which faults are involved and whether earthquakes are happening on major faults.”\u003c/p>\n\u003cp>Catchings said a swarm on a smaller fault is “unlikely to generate a very large earthquake. But if it is connected, say, to the Calaveras or to one of the thrust faults, it could be very significant, and we need to know that.”\u003c/p>\n\u003cfigure id=\"attachment_2000437\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2000437\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00566_TV-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00566_TV-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00566_TV-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00566_TV-KQED-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00566_TV-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Rufus Catchings, a seismologist from USGS, installs a seismometer at a home in San Ramon on March 17, 2026. \u003ccite>(Tâm Vũ/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>San Ramon sits in a part of Contra Costa County that is prone to swarms and has experienced them a handful of times since the 1970s due to a complex system of faults in the region, including the Calaveras, Concord-Green Valley, Pleasanton, Mt. Diablo Thrust, Greenville and Sherburne Hills Thrust.\u003c/p>\n\u003cp>Epstein has lived in San Ramon for 12 years and experienced multiple swarms. The latest quakes have left her with a mountain of unanswered questions.\u003c/p>\n\u003cp>“I read as much as I could to understand whether or not this means that [a big one] is coming,” Epstein said. “I don’t think there is any solid answer. That’s why they’re putting all those little sensors everywhere.”\u003c/p>\n\u003ch2>A web of sensors\u003c/h2>\n\u003cp>The grid of sensors will track movement underground for the next six months, and afterward, seismologists will dig them up and analyze their readings.\u003c/p>\n\u003cp>“We know for sure that we’re going to catch some really small earthquakes because they’re just going on all the time, and if the swarm does pick up again, then we’ll definitely catch that,” said Annemarie Baltay, a research geophysicist with USGS.\u003c/p>\n\u003cfigure id=\"attachment_2000438\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2000438\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00574_TV-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00574_TV-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00574_TV-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00574_TV-KQED-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00574_TV-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Annemarie Baltay (left), a geophysicist researcher from USGS, and Rufus Catchings (right), a seismologist from USGS, install a seismometer at a home in San Ramon on March 17, 2026. \u003ccite>(Tâm Vũ/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>The battery-operated seismometers gather data around 200 times per second, Catchings said.\u003c/p>\n\u003cp>“We know that eventually there’s gonna be a big earthquake here,” Catchings said. “You can look at these mountains and see how they popped up through the tectonic forces.”\u003c/p>\n\u003cp>The researchers theorize that the swarm occurred along smaller sub-faults or due to liquid moving around these marginal cracks. But it’s hard to know exactly what’s happening five to 10 miles underground, Baltay said.\u003c/p>\u003c/div>",
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"content": "\u003cdiv class=\"post-body\">\u003cp>“It’s very likely that the fault goes down, turns, dips and moves around,” Baltay said. “This will help us sort of understand that fault structure at depth.”\u003c/p>\n\u003cp>Baltay said the findings could also show how different soils affect how waves travel through the earth. What researchers learn might require adjustments to the USGS’s National Seismic Hazard Model, which informs local building codes and insurance risk models.\u003c/p>\n\u003cp>Mark Armstrong, mayor of San Ramon, lives in a two-story home smack dab in the epicenter of the recent swarm of quakes. He said the shaking he feels is a reminder that he lives in earthquake country.\u003c/p>\n\u003cp>“A couple of earthquakes were literally in my backyard or across the street,” Armstrong said, recalling rumblings that shook pictures off his bookshelves. The USGS scientists installed a seismometer in his backyard. “There’s a little bit of excitement when you get one of the big ones.”\u003c/p>\n\u003cp>Armstrong said residents have one burning question: “When is it going to stop?”\u003c/p>\n\u003cp>Armstrong said the city is planning an emergency exercise with the American Red Cross, in collaboration with the City of Danville and Contra Costa County. The run-through will likely include activating an emergency operations center and shelters.\u003c/p>\n\u003cfigure id=\"attachment_2000436\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2000436\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00523_TV-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00523_TV-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00523_TV-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00523_TV-KQED-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2026/03/260317-SANRAMONEARTHQUAKES00523_TV-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Rufus Catchings, a seismologist from USGS, installs a seismometer at a home in San Ramon on March 17, 2026. \u003ccite>(Tâm Vũ/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>USGS seismologists also buried a sensor in Gina Veazey’s front yard. The Danville resident can tell an earthquake is going to shake her home when her dog, Stinky, goes “absolutely crazy” and “jumps off the bed.”\u003c/p>\n\u003cp>“Then all of a sudden we feel the tremor, so she’s a good indicator that something’s coming,” Veazey said.\u003c/p>\n\u003cp>Every time Veazey hears the groan of an earthquake, and then the rock and sway that follow, it’s a reminder that “Mother Nature is telling us we just got to roll with the punches that she throws. That’s all we can do.”\u003c/p>\u003c/p>\u003cp>\u003cdiv class='utils-parseShortcode-shortcodes-__shortcodes__shortcodeWrapper'>\n \u003ciframe\n src='https://docs.google.com/forms/d/e/1FAIpQLSeeeKhyuk-_odJH80iw5eAlpLBF-YWJnOi_Yqs4BEN9fY1YJA/viewform?usp=publish-editor?embedded=true'\n title='https://docs.google.com/forms/d/e/1FAIpQLSeeeKhyuk-_odJH80iw5eAlpLBF-YWJnOi_Yqs4BEN9fY1YJA/viewform?usp=publish-editor'\n width='760' height='500'\n frameborder='0'\n marginheight='0' marginwidth='0'>\u003c/iframe>\u003c/div>\u003c/p>\u003cp>\u003cp>\u003c/p>\n\u003c/div>\u003c/p>",
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"slug": "earthquake-swarm-in-san-ramon-is-felt-around-bay-area-with-over-20-small-quakes",
"title": "Earthquake Swarm in San Ramon Is Felt Around Bay Area, With Over 20 Small Quakes",
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"headTitle": "Earthquake Swarm in San Ramon Is Felt Around Bay Area, With Over 20 Small Quakes | KQED",
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"content": "\u003cp>A flurry of \u003ca href=\"https://www.kqed.org/earthquakes\">earthquakes\u003c/a> shook San Ramon early Monday, the latest swarm of small quakes that have rattled residents in recent months.\u003c/p>\n\u003cp>The U.S. Geological Survey has recorded \u003ca href=\"https://earthquake.usgs.gov/earthquakes/map/?extent=37.74063,-121.97448&extent=37.78114,-121.89603&listOnlyShown=true\">21 quakes\u003c/a> near the Contra Costa County city through the morning, with the largest registering at a magnitude 4.2 just after 7 a.m.\u003c/p>\n\u003cp>The quake originated southeast of San Ramon, with the most intense shaking felt in the city and nearby Dublin. People in large parts of the East Bay, from Oakland and Hayward to Pleasanton, as well as eastern parts of San Francisco, also reported rattling.\u003c/p>\n\u003cp>[ad fullwidth]\u003c/p>\n\u003cp>In San Ramon, Rachael Heys was woken up by the 4.2 magnitude quake, which she said was one of the biggest she’s felt in a long time. It knocked over some things throughout her home and sent her cats into hiding.\u003c/p>\n\u003cp>“This is getting really scary,” Heys said after another quake, which registered at magnitude 3.8, occurred just before 7:30 a.m.\u003c/p>\n\u003cp>The other quakes ranging from magnitude 2.5 to 3.8 occurred around Alcosta Boulevard, south of Bollinger Canyon Road. They likely originated along the Calaveras Fault, which produced another swarm of earthquakes in San Ramon in December.\u003c/p>\n\u003cfigure id=\"attachment_12071926\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-12071926\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/02/251215-EarthquakeSwarms-22-BL_qed.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/02/251215-EarthquakeSwarms-22-BL_qed.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/02/251215-EarthquakeSwarms-22-BL_qed-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/02/251215-EarthquakeSwarms-22-BL_qed-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">A sign says, “Welcome to San Ramon” in San Ramon on Dec. 15, 2025. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>It’s \u003ca href=\"https://www.kqed.org/science/1999633/scientists-say-san-ramons-latest-earthquake-swarm-is-normal-but-residents-are-on-edge\">common for the fault to produce such flurries\u003c/a>, according to seismologists. Experts say smaller quakes don’t generally signal a “Big One” is imminent, and the USGS reports that after Monday’s seismic activity, there’s less than a 6% chance of a larger quake in the next week.\u003c/p>\n\u003cp>But the slip-strike fault is believed to have about an 11% chance of producing a larger quake by 2033. Calaveras is capable of producing a 6.7 magnitude earthquake. It shook Morgan Hill with a magnitude 6.2 in 1984.\u003c/p>\n\u003cp>“This has been an absolutely crazy hour,” Mona Epstein, another San Ramon resident, said after the initial flurry of quakes. “It just won’t stop. My nerves are frazzled.”\u003c/p>\n\u003cp>No major damage or injuries resulting from Monday’s shaking has been reported, but Epstein said the quakes kept her awake much of the early morning, and Nextdoor was “blowing up” with fears and reactions from neighbors. Epstein said her doors popped open during one of the quakes.\u003c/p>\n\u003cp>BART reduced train speeds to conduct track safety inspections following the shaking. The agency said to expect delays up to 20 minutes systemwide as it recovers.\u003c/p>\n\u003cp>The last quake in the area occurred just after 9 a.m.\u003c/p>\n\u003cp>\u003cem>KQED’s \u003c/em>\u003ca href=\"https://www.kqed.org/author/eromero\">\u003cem>Ezra David Romero\u003c/em>\u003c/a>\u003cem> contributed to this report.\u003c/em>\u003c/p>\n\u003cp>\u003c/p>\n",
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"excerpt": "A flurry of earthquakes shook the East Bay early Monday, with the largest registered at a magnitude 4.2 just after 7 a.m. Such clusters are common for the Calaveras Fault.",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003cp>A flurry of \u003ca href=\"https://www.kqed.org/earthquakes\">earthquakes\u003c/a> shook San Ramon early Monday, the latest swarm of small quakes that have rattled residents in recent months.\u003c/p>\n\u003cp>The U.S. Geological Survey has recorded \u003ca href=\"https://earthquake.usgs.gov/earthquakes/map/?extent=37.74063,-121.97448&extent=37.78114,-121.89603&listOnlyShown=true\">21 quakes\u003c/a> near the Contra Costa County city through the morning, with the largest registering at a magnitude 4.2 just after 7 a.m.\u003c/p>\n\u003cp>The quake originated southeast of San Ramon, with the most intense shaking felt in the city and nearby Dublin. People in large parts of the East Bay, from Oakland and Hayward to Pleasanton, as well as eastern parts of San Francisco, also reported rattling.\u003c/p>\n\u003cp>\u003c/p>\u003c/div>",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003c/p>\n\u003cp>In San Ramon, Rachael Heys was woken up by the 4.2 magnitude quake, which she said was one of the biggest she’s felt in a long time. It knocked over some things throughout her home and sent her cats into hiding.\u003c/p>\n\u003cp>“This is getting really scary,” Heys said after another quake, which registered at magnitude 3.8, occurred just before 7:30 a.m.\u003c/p>\n\u003cp>The other quakes ranging from magnitude 2.5 to 3.8 occurred around Alcosta Boulevard, south of Bollinger Canyon Road. They likely originated along the Calaveras Fault, which produced another swarm of earthquakes in San Ramon in December.\u003c/p>\n\u003cfigure id=\"attachment_12071926\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-12071926\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/02/251215-EarthquakeSwarms-22-BL_qed.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2026/02/251215-EarthquakeSwarms-22-BL_qed.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/02/251215-EarthquakeSwarms-22-BL_qed-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/10/2026/02/251215-EarthquakeSwarms-22-BL_qed-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">A sign says, “Welcome to San Ramon” in San Ramon on Dec. 15, 2025. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>It’s \u003ca href=\"https://www.kqed.org/science/1999633/scientists-say-san-ramons-latest-earthquake-swarm-is-normal-but-residents-are-on-edge\">common for the fault to produce such flurries\u003c/a>, according to seismologists. Experts say smaller quakes don’t generally signal a “Big One” is imminent, and the USGS reports that after Monday’s seismic activity, there’s less than a 6% chance of a larger quake in the next week.\u003c/p>\n\u003cp>But the slip-strike fault is believed to have about an 11% chance of producing a larger quake by 2033. Calaveras is capable of producing a 6.7 magnitude earthquake. It shook Morgan Hill with a magnitude 6.2 in 1984.\u003c/p>\n\u003cp>“This has been an absolutely crazy hour,” Mona Epstein, another San Ramon resident, said after the initial flurry of quakes. “It just won’t stop. My nerves are frazzled.”\u003c/p>\n\u003cp>No major damage or injuries resulting from Monday’s shaking has been reported, but Epstein said the quakes kept her awake much of the early morning, and Nextdoor was “blowing up” with fears and reactions from neighbors. Epstein said her doors popped open during one of the quakes.\u003c/p>\n\u003cp>BART reduced train speeds to conduct track safety inspections following the shaking. The agency said to expect delays up to 20 minutes systemwide as it recovers.\u003c/p>\n\u003cp>The last quake in the area occurred just after 9 a.m.\u003c/p>\n\u003cp>\u003cem>KQED’s \u003c/em>\u003ca href=\"https://www.kqed.org/author/eromero\">\u003cem>Ezra David Romero\u003c/em>\u003c/a>\u003cem> contributed to this report.\u003c/em>\u003c/p>\n\u003cp>\u003c/p>\n\u003c/div>\u003c/p>",
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"content": "\u003cp>Two \u003ca href=\"https://www.kqed.org/science/1936949/do-little-quakes-mean-the-big-one-is-close-at-hand\">earthquakes\u003c/a> shook Mona Epstein awake in the middle of the night, long before she crawled out of bed on the morning of Dec. 8.\u003c/p>\n\u003cp>But it was the rocking from the magnitude 3.6 quake just after 9 a.m. that caused the San Ramon resident to scream.\u003c/p>\n\u003cp>“There was a loud rumble,” said Epstein, who lives about a mile from where the quake hit. “The cupboard doors opened, my armoire door popped open and things popped out of the closet.”\u003c/p>\n\u003cp>[ad fullwidth]\u003c/p>\n\u003cp>Epstein said she hesitated to even shower afterward for fear of another earthquake. “If it was the big one,” then she didn’t want to “be naked and have to run out.”\u003c/p>\n\u003cp>Nearly 1,600 people as far away as San José reported they felt the quake, which occurred along the Calaveras Fault, the United States Geological Survey \u003ca href=\"https://earthquake.usgs.gov/earthquakes/eventpage/nc75276661/impact\">reported\u003c/a>.\u003c/p>\n\u003cp>Over the last month, more than 150 earthquakes jolted the San Ramon area — including \u003ca href=\"https://earthquake.usgs.gov/earthquakes/map/?currentFeatureId=nc75276661&extent=37.73196,-121.97116&extent=37.77139,-121.91623&range=week&settings=true\">10 earthquakes at or above a magnitude 2.5\u003c/a> on Dec. 8, according to Amy Williamson, a research seismologist at the \u003ca href=\"https://earthquakes.berkeley.edu/seismo.real.time.map.html\">UC Berkeley Seismology Lab\u003c/a>. On Friday, an additional half dozen quakes rocked San Ramon, including a \u003ca href=\"https://earthquake.usgs.gov/earthquakes/map/?extent=37.70936,-121.99236&extent=37.78822,-121.8825&range=week&settings=true\">magnitude 4.0 earthquake\u003c/a> just before 8 p.m.\u003c/p>\n\u003cfigure id=\"attachment_1999667\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1999667\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EarthquakeSwarms-15-BL_qed.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EarthquakeSwarms-15-BL_qed.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EarthquakeSwarms-15-BL_qed-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EarthquakeSwarms-15-BL_qed-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EarthquakeSwarms-15-BL_qed-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Mona Epstein stands in her apartment in San Ramon on Dec. 15, 2025. She experienced a recent swarm of small earthquakes in the area. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>This part of Contra Costa County is prone to earthquake swarms and has experienced these events a handful of times since the 1970s, due to a complex system of faults.\u003c/p>\n\u003cp>“They’ve had these sorts of swarms for decades now,” Williamson said. “For San Ramon to the Danville area, it’s really common.”\u003c/p>\n\u003cp>Epstein experienced an earlier swarm back in 2018 while living in San Ramon, a city with a population of nearly 80,000.\u003c/p>\n\u003cp>While these earthquake clusters aren’t out of the ordinary, they can still come as a surprise, especially if you live right above the jolt, like Rachael Heys, whose street in San Ramon is located right over the epicenter of last week’s swarm.\u003c/p>\n\u003cfigure id=\"attachment_1999657\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1999657\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-16-BL-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-16-BL-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-16-BL-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-16-BL-KQED-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-16-BL-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Mona Epstein keeps a weather radio and flashlight on her kitchen counter in her apartment in San Ramon on Dec. 15, 2025. A recent swarm of small earthquakes in the area motivated her to prepare for emergencies. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>She credits her cat, Marshall — named after rapper Eminem — for warning her that an earthquake was about to hit in the middle of the night. He made “weird little noises” and hid under a table.\u003c/p>\n\u003cp>“Within seconds of him yelling this big loud meow, there was a big earthquake,” Heys said. “It really shook me. It sounded like a dresser hit the wall. It was like this one big bang.”\u003c/p>\n\u003cp>Heys and her boyfriend felt at least two other quakes that morning.\u003c/p>\n\u003cp>“We had all of these mini ones mostly in that one day,” Heys said. “This is insane.”\u003c/p>\n\u003cfigure id=\"attachment_1999655\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1999655\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-04-BL-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-04-BL-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-04-BL-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-04-BL-KQED-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-04-BL-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Rachael Heys holds her cat Marshall outside her apartment building in San Ramon on Dec. 15, 2025. The area recently experienced a sequence of small earthquakes that residents reported feeling over several days. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>Earthquake swarms differ from a typical earthquake sequence, where there’s one main shock and then a series of small aftershocks, Williamson said. Swarms don’t usually have a dominant earthquake. Instead, a cluster of tiny or minor earthquakes takes place over a more extended period of time, and then the fault quiets down.\u003c/p>\n\u003cp>“The fact that there’s a swarm here doesn’t make it any more or less likely for the big one that people are always talking about in the Bay Area,” Williamson said.\u003c/p>\n\u003cp>Earthquake swarms typically occur due to changes in the liquid around a fault. They’re common in places near volcanoes and geothermal areas. But Williamson said what makes the San Ramon area “a little bit unique” is that the area isn’t volcanic or hydrothermal.[aside postID=news_12060130 hero='https://cdn.kqed.org/wp-content/uploads/sites/10/2025/10/SFFireDeptLomaPrieta1.jpg']San Ramon sits over a complex geologic environment, which is one theory, Williamson said, for why the area gets swarms every few years. The Calaveras Fault runs underneath the city in a transition zone.\u003c/p>\n\u003cp>It is part of the San Andreas Fault system and is \u003ca href=\"https://pubs.usgs.gov/publication/fs20153009\">capable of a magnitude 6.7 earthquake\u003c/a>. To the east, the Mount Diablo Thrust Fault begins.\u003c/p>\n\u003cp>“All these earthquakes happen in that transition area,” Williamson said. “Any small changes kind of cause that area to preferentially get more earthquakes.”\u003c/p>\n\u003cp>The last big quake the Calaveras Fault produced was in 1984 in Morgan Hill with a magnitude of 6.2. But if the Hayward Fault and the Calaveras Fault, which UC Berkeley scientists found are \u003ca href=\"https://www.universityofcalifornia.edu/news/calaveras-hayward-fault-link-means-potentially-larger-quakes\">connected\u003c/a>, rock simultaneously, that could result in a magnitude 7.3 earthquake.\u003c/p>\n\u003cp>Faults contain liquid that lubricates the earth, making it easier to move and causing earthquakes. Similar to a person wetting their hands and sliding them together, the fluid reduces the friction, and the rock “can slide more freely,” Williamson said.\u003c/p>\n\u003cp>Williamson said the liquid is usually a mix of water and minerals, and that there isn’t a “great model” to say exactly how it moves through cracks within the fault system. That movement can cause the quakes.\u003c/p>\n\u003cp>Williamson said the “constant rattle” should serve as a reminder that Bay Area residents live in a “really seismically active area.” She recommended \u003ca href=\"https://www.kqed.org/science/1949019/its-about-time-how-to-get-ready-for-the-next-emergency\">preparing a go bag\u003c/a> with clothes, food and water.\u003c/p>\n\u003cfigure id=\"attachment_1999661\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1999661\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-19-BL-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-19-BL-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-19-BL-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-19-BL-KQED-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-19-BL-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">A sign for apartments on Deerwood Road in San Ramon on Dec. 15, 2025. The area sits near the Calaveras Fault, an active fault that runs underground through the East Bay. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>Epstein, who is retired, said she’s started to prepare for a larger earthquake, collecting masks, gloves, water, tools, and canned food — although she needs to double-check the expiration dates to make sure the food is still good to eat.\u003c/p>\n\u003cp>“I’m not to the point where I’m gonna sleep with my shoes on or anything,” Epstein said. “I just hope if the worst happens that I can get to the bag in the closet.”\u003c/p>\n\u003cp>Heys, who works as a server in Danville, on the other hand, is very prepared. She has a supply of perishable food, flashlights, portable chargers that also act as flashlights, mini candles, gallons of water and a case of water in her car.\u003c/p>\n\u003cp>She’s talked with her friends and neighbors about the quakes and how they’ve prepared, but they don’t seem as concerned.\u003c/p>\n\u003cp>“Nobody really has any major concerns as of now,” Heys said. “I think that’s because none of us has experienced a huge one yet.”\u003c/p>\n\u003cp>[ad floatright]\u003c/p>\n",
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"excerpt": "A swarm of small earthquakes jolted San Ramon over the last month. Scientists said the earthquakes are normal and aren’t indicative of the big one. ",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003cp>Two \u003ca href=\"https://www.kqed.org/science/1936949/do-little-quakes-mean-the-big-one-is-close-at-hand\">earthquakes\u003c/a> shook Mona Epstein awake in the middle of the night, long before she crawled out of bed on the morning of Dec. 8.\u003c/p>\n\u003cp>But it was the rocking from the magnitude 3.6 quake just after 9 a.m. that caused the San Ramon resident to scream.\u003c/p>\n\u003cp>“There was a loud rumble,” said Epstein, who lives about a mile from where the quake hit. “The cupboard doors opened, my armoire door popped open and things popped out of the closet.”\u003c/p>\n\u003cp>\u003c/p>\u003c/div>",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003c/p>\n\u003cp>Epstein said she hesitated to even shower afterward for fear of another earthquake. “If it was the big one,” then she didn’t want to “be naked and have to run out.”\u003c/p>\n\u003cp>Nearly 1,600 people as far away as San José reported they felt the quake, which occurred along the Calaveras Fault, the United States Geological Survey \u003ca href=\"https://earthquake.usgs.gov/earthquakes/eventpage/nc75276661/impact\">reported\u003c/a>.\u003c/p>\n\u003cp>Over the last month, more than 150 earthquakes jolted the San Ramon area — including \u003ca href=\"https://earthquake.usgs.gov/earthquakes/map/?currentFeatureId=nc75276661&extent=37.73196,-121.97116&extent=37.77139,-121.91623&range=week&settings=true\">10 earthquakes at or above a magnitude 2.5\u003c/a> on Dec. 8, according to Amy Williamson, a research seismologist at the \u003ca href=\"https://earthquakes.berkeley.edu/seismo.real.time.map.html\">UC Berkeley Seismology Lab\u003c/a>. On Friday, an additional half dozen quakes rocked San Ramon, including a \u003ca href=\"https://earthquake.usgs.gov/earthquakes/map/?extent=37.70936,-121.99236&extent=37.78822,-121.8825&range=week&settings=true\">magnitude 4.0 earthquake\u003c/a> just before 8 p.m.\u003c/p>\n\u003cfigure id=\"attachment_1999667\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1999667\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EarthquakeSwarms-15-BL_qed.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EarthquakeSwarms-15-BL_qed.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EarthquakeSwarms-15-BL_qed-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EarthquakeSwarms-15-BL_qed-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EarthquakeSwarms-15-BL_qed-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Mona Epstein stands in her apartment in San Ramon on Dec. 15, 2025. She experienced a recent swarm of small earthquakes in the area. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>This part of Contra Costa County is prone to earthquake swarms and has experienced these events a handful of times since the 1970s, due to a complex system of faults.\u003c/p>\n\u003cp>“They’ve had these sorts of swarms for decades now,” Williamson said. “For San Ramon to the Danville area, it’s really common.”\u003c/p>\n\u003cp>Epstein experienced an earlier swarm back in 2018 while living in San Ramon, a city with a population of nearly 80,000.\u003c/p>\n\u003cp>While these earthquake clusters aren’t out of the ordinary, they can still come as a surprise, especially if you live right above the jolt, like Rachael Heys, whose street in San Ramon is located right over the epicenter of last week’s swarm.\u003c/p>\n\u003cfigure id=\"attachment_1999657\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1999657\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-16-BL-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-16-BL-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-16-BL-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-16-BL-KQED-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-16-BL-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Mona Epstein keeps a weather radio and flashlight on her kitchen counter in her apartment in San Ramon on Dec. 15, 2025. A recent swarm of small earthquakes in the area motivated her to prepare for emergencies. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>She credits her cat, Marshall — named after rapper Eminem — for warning her that an earthquake was about to hit in the middle of the night. He made “weird little noises” and hid under a table.\u003c/p>\n\u003cp>“Within seconds of him yelling this big loud meow, there was a big earthquake,” Heys said. “It really shook me. It sounded like a dresser hit the wall. It was like this one big bang.”\u003c/p>\n\u003cp>Heys and her boyfriend felt at least two other quakes that morning.\u003c/p>\n\u003cp>“We had all of these mini ones mostly in that one day,” Heys said. “This is insane.”\u003c/p>\n\u003cfigure id=\"attachment_1999655\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1999655\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-04-BL-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-04-BL-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-04-BL-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-04-BL-KQED-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-04-BL-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">Rachael Heys holds her cat Marshall outside her apartment building in San Ramon on Dec. 15, 2025. The area recently experienced a sequence of small earthquakes that residents reported feeling over several days. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>Earthquake swarms differ from a typical earthquake sequence, where there’s one main shock and then a series of small aftershocks, Williamson said. Swarms don’t usually have a dominant earthquake. Instead, a cluster of tiny or minor earthquakes takes place over a more extended period of time, and then the fault quiets down.\u003c/p>\n\u003cp>“The fact that there’s a swarm here doesn’t make it any more or less likely for the big one that people are always talking about in the Bay Area,” Williamson said.\u003c/p>\n\u003cp>Earthquake swarms typically occur due to changes in the liquid around a fault. They’re common in places near volcanoes and geothermal areas. But Williamson said what makes the San Ramon area “a little bit unique” is that the area isn’t volcanic or hydrothermal.\u003c/p>\u003c/div>",
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"content": "\u003cdiv class=\"post-body\">\u003cp>San Ramon sits over a complex geologic environment, which is one theory, Williamson said, for why the area gets swarms every few years. The Calaveras Fault runs underneath the city in a transition zone.\u003c/p>\n\u003cp>It is part of the San Andreas Fault system and is \u003ca href=\"https://pubs.usgs.gov/publication/fs20153009\">capable of a magnitude 6.7 earthquake\u003c/a>. To the east, the Mount Diablo Thrust Fault begins.\u003c/p>\n\u003cp>“All these earthquakes happen in that transition area,” Williamson said. “Any small changes kind of cause that area to preferentially get more earthquakes.”\u003c/p>\n\u003cp>The last big quake the Calaveras Fault produced was in 1984 in Morgan Hill with a magnitude of 6.2. But if the Hayward Fault and the Calaveras Fault, which UC Berkeley scientists found are \u003ca href=\"https://www.universityofcalifornia.edu/news/calaveras-hayward-fault-link-means-potentially-larger-quakes\">connected\u003c/a>, rock simultaneously, that could result in a magnitude 7.3 earthquake.\u003c/p>\n\u003cp>Faults contain liquid that lubricates the earth, making it easier to move and causing earthquakes. Similar to a person wetting their hands and sliding them together, the fluid reduces the friction, and the rock “can slide more freely,” Williamson said.\u003c/p>\n\u003cp>Williamson said the liquid is usually a mix of water and minerals, and that there isn’t a “great model” to say exactly how it moves through cracks within the fault system. That movement can cause the quakes.\u003c/p>\n\u003cp>Williamson said the “constant rattle” should serve as a reminder that Bay Area residents live in a “really seismically active area.” She recommended \u003ca href=\"https://www.kqed.org/science/1949019/its-about-time-how-to-get-ready-for-the-next-emergency\">preparing a go bag\u003c/a> with clothes, food and water.\u003c/p>\n\u003cfigure id=\"attachment_1999661\" class=\"wp-caption aligncenter\" style=\"max-width: 2000px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1999661\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-19-BL-KQED.jpg\" alt=\"\" width=\"2000\" height=\"1333\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-19-BL-KQED.jpg 2000w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-19-BL-KQED-160x107.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-19-BL-KQED-768x512.jpg 768w, https://cdn.kqed.org/wp-content/uploads/sites/35/2025/12/251215-EARTHQUAKESWARMS-19-BL-KQED-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\">\u003cfigcaption class=\"wp-caption-text\">A sign for apartments on Deerwood Road in San Ramon on Dec. 15, 2025. The area sits near the Calaveras Fault, an active fault that runs underground through the East Bay. \u003ccite>(Beth LaBerge/KQED)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>Epstein, who is retired, said she’s started to prepare for a larger earthquake, collecting masks, gloves, water, tools, and canned food — although she needs to double-check the expiration dates to make sure the food is still good to eat.\u003c/p>\n\u003cp>“I’m not to the point where I’m gonna sleep with my shoes on or anything,” Epstein said. “I just hope if the worst happens that I can get to the bag in the closet.”\u003c/p>\n\u003cp>Heys, who works as a server in Danville, on the other hand, is very prepared. She has a supply of perishable food, flashlights, portable chargers that also act as flashlights, mini candles, gallons of water and a case of water in her car.\u003c/p>\n\u003cp>She’s talked with her friends and neighbors about the quakes and how they’ve prepared, but they don’t seem as concerned.\u003c/p>\n\u003cp>“Nobody really has any major concerns as of now,” Heys said. “I think that’s because none of us has experienced a huge one yet.”\u003c/p>\n\u003cp>\u003c/p>\u003c/div>",
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"content": "\u003cp>The errant \u003ca href=\"https://www.kqed.org/news/tag/earthquake\">earthquake\u003c/a> warning that lit up phones across Northern California with a notice of a quake in Nevada on Thursday morning was not a result of a problem with the early warning delivery system or MyShake phone application, officials said.\u003c/p>\n\u003cp>At least four separate seismic stations detected ground motion “that told the system there was an earthquake,” which triggered the false warning of a magnitude 5.9 earthquake, according to officials with the U.S. Geological Survey.\u003c/p>\n\u003cp>The USGS quickly canceled the warning and posted a statement online that said there was no earthquake at all.\u003c/p>\n\u003cp>[ad fullwidth]\u003c/p>\n\u003cp>“This is the very first time we’ve had what I call a through and through false alert delivery because of something that may have happened out somewhere out in the field,” ShakeAlert operations team lead Robert de Groot told KQED. “We’ve had occurrences where we’ve alerted more people than should have been alerted, but [in this case] something triggered the system, but it wasn’t an earthquake.”\u003c/p>\n\u003cp>USGS officials do not yet know what caused the shaking. De Groot said research teams are analyzing information from other seismic stations and could potentially launch a field investigation.\u003c/p>\n\u003cp>“Earth does different things all the time and we can’t know everything, but we’re continuing to improve the system to understand,” he said.\u003c/p>\n\u003cp>The alert, which urged people to “drop, cover and hold on” to prepare for imminent shaking, caused at least one TV station, KTVU, to report on the quake.\u003c/p>\n\u003cp>Four million Californians have downloaded\u003ca href=\"https://www.kqed.org/news/12059704/why-your-phone-may-get-a-loud-earthquake-test-alert-this-week-and-how-the-myshake-app-works\"> the MyShake app\u003c/a>, which provides real-time alerts for earthquakes on smartphones.\u003c/p>\n\u003cp>The app was developed at UC Berkeley’s Seismology Lab and funded by the California Governor’s Office of Emergency Services (Cal OES). It buzzes when an earthquake of a magnitude of 4.5 or higher occurs.\u003c/p>\n\u003cp>Berkeley’s seismology team posted a statement to social media at 9:55 a.m. about the false alert by the USGS ShakeAlert system and distributed by the MyShake phone application.\u003c/p>\n\u003cp>“This system has delivered more than 170 real alerts since 2019 and this incident is both unprecedented and rare,” MyShake said on \u003ca href=\"https://x.com/MyShakeApp/status/1996639456678629734\">X\u003c/a>. “Fortunately, there was no danger this morning, but this serves as a reminder that earthquake preparedness is essential.”\u003c/p>\n\u003cp>\u003c/p>\n",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003cp>The errant \u003ca href=\"https://www.kqed.org/news/tag/earthquake\">earthquake\u003c/a> warning that lit up phones across Northern California with a notice of a quake in Nevada on Thursday morning was not a result of a problem with the early warning delivery system or MyShake phone application, officials said.\u003c/p>\n\u003cp>At least four separate seismic stations detected ground motion “that told the system there was an earthquake,” which triggered the false warning of a magnitude 5.9 earthquake, according to officials with the U.S. Geological Survey.\u003c/p>\n\u003cp>The USGS quickly canceled the warning and posted a statement online that said there was no earthquake at all.\u003c/p>\n\u003cp>\u003c/p>\u003c/div>",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003c/p>\n\u003cp>“This is the very first time we’ve had what I call a through and through false alert delivery because of something that may have happened out somewhere out in the field,” ShakeAlert operations team lead Robert de Groot told KQED. “We’ve had occurrences where we’ve alerted more people than should have been alerted, but [in this case] something triggered the system, but it wasn’t an earthquake.”\u003c/p>\n\u003cp>USGS officials do not yet know what caused the shaking. De Groot said research teams are analyzing information from other seismic stations and could potentially launch a field investigation.\u003c/p>\n\u003cp>“Earth does different things all the time and we can’t know everything, but we’re continuing to improve the system to understand,” he said.\u003c/p>\n\u003cp>The alert, which urged people to “drop, cover and hold on” to prepare for imminent shaking, caused at least one TV station, KTVU, to report on the quake.\u003c/p>\n\u003cp>Four million Californians have downloaded\u003ca href=\"https://www.kqed.org/news/12059704/why-your-phone-may-get-a-loud-earthquake-test-alert-this-week-and-how-the-myshake-app-works\"> the MyShake app\u003c/a>, which provides real-time alerts for earthquakes on smartphones.\u003c/p>\n\u003cp>The app was developed at UC Berkeley’s Seismology Lab and funded by the California Governor’s Office of Emergency Services (Cal OES). It buzzes when an earthquake of a magnitude of 4.5 or higher occurs.\u003c/p>\n\u003cp>Berkeley’s seismology team posted a statement to social media at 9:55 a.m. about the false alert by the USGS ShakeAlert system and distributed by the MyShake phone application.\u003c/p>\n\u003cp>“This system has delivered more than 170 real alerts since 2019 and this incident is both unprecedented and rare,” MyShake said on \u003ca href=\"https://x.com/MyShakeApp/status/1996639456678629734\">X\u003c/a>. “Fortunately, there was no danger this morning, but this serves as a reminder that earthquake preparedness is essential.”\u003c/p>\n\u003cp>\u003c/p>\n\u003c/div>\u003c/p>",
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"slug": "early-morning-earthquake-cluster-rattles-gilroy-and-the-bay-area",
"title": "Early Morning Earthquake Cluster Rattles Gilroy and the Bay Area",
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"content": "\u003cp>The South Bay was rattled by a cluster of small earthquakes on Wednesday morning, according to data from the \u003ca href=\"https://earthquake.usgs.gov/earthquakes/map/?currentFeatureId=nc75269596&extent=36.78399,-122.0842&extent=37.45633,-120.99106&listOnlyShown=true\">U.S. Geological Survey\u003c/a>.\u003c/p>\n\u003cp>A magnitude 4.0 quake hit just east of Gilroy at 6:16 a.m., and it was followed within minutes by two smaller tremors.\u003c/p>\n\u003cp>At 6:18 a.m., a magnitude 2.7 aftershock hit less than a mile from the epicenter of the first, and at 6:20 a.m., a magnitude 3.6 quake struck slightly south.\u003c/p>\n\u003cp>[ad fullwidth]\u003c/p>\n\u003cp>The shaking appears to have been centered in San José and throughout the South Bay, with light to moderate shaking closest to the epicenter of the largest quake, though people as far north as Antioch and south as San Lucas \u003ca href=\"https://earthquake.usgs.gov/earthquakes/eventpage/ew1764166600/map?shakemap-code=75269596&shakemap-source=nc&shakemap-intensity=true&shakemap-mmi-contours=false&shakemap-macroseismic-stations=true&shakemap-seismic-stations=true\">reported feeling the quake\u003c/a>. No reports of damage were immediately available.\u003c/p>\n\u003cp>According to the USGS, the Calaveras Fault likely produced the earthquakes. The last large quake recorded on the slip-strike fault was a magnitude 6.2 quake that jolted \u003ca href=\"https://earthquake.usgs.gov/earthquakes/eventpage/ew1764166600/region-info\">Morgan Hill in 1984.\u003c/a> Cavaleras is believed to have about an 11% chance of producing a larger quake by 2033.\u003c/p>\n\u003cp>The odds that Wednesday’s cluster of quakes is a precursor to a much bigger one are low — USGS data shows there is about a \u003ca href=\"https://earthquake.usgs.gov/earthquakes/eventpage/ew1764166600/oaf/overview\">14% chance\u003c/a> of another one above magnitude 3.0, and those odds drop to 2% for a magnitude 4.0 or higher quake.\u003c/p>\n\u003cp>\u003c/p>\n",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003c/p>\n\u003cp>The shaking appears to have been centered in San José and throughout the South Bay, with light to moderate shaking closest to the epicenter of the largest quake, though people as far north as Antioch and south as San Lucas \u003ca href=\"https://earthquake.usgs.gov/earthquakes/eventpage/ew1764166600/map?shakemap-code=75269596&shakemap-source=nc&shakemap-intensity=true&shakemap-mmi-contours=false&shakemap-macroseismic-stations=true&shakemap-seismic-stations=true\">reported feeling the quake\u003c/a>. No reports of damage were immediately available.\u003c/p>\n\u003cp>According to the USGS, the Calaveras Fault likely produced the earthquakes. The last large quake recorded on the slip-strike fault was a magnitude 6.2 quake that jolted \u003ca href=\"https://earthquake.usgs.gov/earthquakes/eventpage/ew1764166600/region-info\">Morgan Hill in 1984.\u003c/a> Cavaleras is believed to have about an 11% chance of producing a larger quake by 2033.\u003c/p>\n\u003cp>The odds that Wednesday’s cluster of quakes is a precursor to a much bigger one are low — USGS data shows there is about a \u003ca href=\"https://earthquake.usgs.gov/earthquakes/eventpage/ew1764166600/oaf/overview\">14% chance\u003c/a> of another one above magnitude 3.0, and those odds drop to 2% for a magnitude 4.0 or higher quake.\u003c/p>\n\u003cp>\u003c/p>\n\u003c/div>\u003c/p>",
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"content": "\u003cp>Just minutes after a minor earthquake shook the \u003ca href=\"https://www.kqed.org/news/tag/bay-area\">Bay Area\u003c/a>, San Francisco officials demonstrated the city’s preparedness for a more serious natural disaster — with what they called the nation’s only dedicated emergency firefighting system.\u003c/p>\n\u003cp>The demonstration also commemorated the anniversary of the 1989 \u003ca href=\"https://www.kqed.org/news/tag/loma-prieta\">Loma Prieta\u003c/a> earthquake — which caused catastrophic consequences to Bay Area residents.\u003c/p>\n\u003cp>The 6.9 magnitude disaster, 36 years ago on Friday, killed 63 people, injured 3,800 and led to the collapse of the upper deck of the San Francisco-Oakland Bay Bridge. A natural gas main rupture in the Marina District caused a \u003ca href=\"http://www.sfmuseum.org/hist2/presidio.html\" target=\"_blank\" rel=\"noopener\">fire\u003c/a> to break out, and the neighborhood’s hydrants ran dry.\u003c/p>\n\u003cp>[ad fullwidth]\u003c/p>\n\u003cp>Standing on a fire truck parked outside of Pump Station 2, at 3455 Van Ness Ave., firefighters pumped water from the San Francisco Bay through the pipes, and back into the Bay in a large stream.\u003c/p>\n\u003cp>The test marked the end of an eight-year, $20 million upgrade to Pump Station 2, part of the city’s auxiliary water supply system. The system should now be able to withstand a 7.9 magnitude earthquake, and will allow the city to have a limitless supply of water to respond to fires when a similar quake were to occur again here.\u003c/p>\n\u003cp>\u003cstrong>“\u003c/strong>This building has strengthened walls, a new roof, a new generator, and is designed to withstand a 7.9 magnitude earthquake, and it can operate even when the electric grid is down,” said Dennis Herrera, general manager at the San Francisco Public Utilities Commission.\u003c/p>\n\u003cfigure id=\"attachment_11804757\" class=\"wp-caption aligncenter\" style=\"max-width: 1920px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-11804757\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2021/02/RS41727_earthquake-qut.jpg\" alt=\"Firefighters extinguish fire in the Marina District in San Francisco in October 1989 after the Loma Prieta earthquake erupted in the city.\" width=\"1920\" height=\"1294\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2021/02/RS41727_earthquake-qut.jpg 1920w, https://cdn.kqed.org/wp-content/uploads/sites/10/2021/02/RS41727_earthquake-qut-160x108.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/10/2021/02/RS41727_earthquake-qut-800x539.jpg 800w, https://cdn.kqed.org/wp-content/uploads/sites/10/2021/02/RS41727_earthquake-qut-1020x687.jpg 1020w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\">\u003cfigcaption class=\"wp-caption-text\">Firefighters extinguish fires in the Marina District in San Francisco in October 1989 after the Loma Prieta earthquake erupted in the city. \u003ccite>(Jonathan Nourok/AFP/Getty Images)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>But the water won’t reach all parts of the city equally. In bracing for “the big one,” city officials admit that some parts of the city are more prepared than others.\u003c/p>\n\u003cp>Katie Miller, the director of water capital programs at the San Francisco Public Utilities Commission, said that the western and southern parts of the city, like the Sunset and Richmond districts, have fewer pipes connected to the city’s water supply. Most of the pipe is in older parts of the city, like downtown.\u003c/p>\n\u003cp>“We have already installed about two miles of the pipe, and we have additional funding available for another four miles in the Sunset. But we’re looking to future emergency safety and earthquake response bond funding that will come to the voters in 2026 or 2028,” she said.\u003c/p>\n\u003cp>Mayor Daniel Lurie attended Thursday’s demonstration and told attendees the city is “always preparing” for the “Big One.”\u003c/p>\n\u003cp>“We have made real progress. We’ve upgraded our emergency water systems, strengthened our fire stations, and improved public safety infrastructure,” he said.\u003c/p>\n\u003cp>\u003c/p>\n",
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"content": "\u003cdiv class=\"post-body\">\u003cp>\u003c/p>\n\u003cp>Standing on a fire truck parked outside of Pump Station 2, at 3455 Van Ness Ave., firefighters pumped water from the San Francisco Bay through the pipes, and back into the Bay in a large stream.\u003c/p>\n\u003cp>The test marked the end of an eight-year, $20 million upgrade to Pump Station 2, part of the city’s auxiliary water supply system. The system should now be able to withstand a 7.9 magnitude earthquake, and will allow the city to have a limitless supply of water to respond to fires when a similar quake were to occur again here.\u003c/p>\n\u003cp>\u003cstrong>“\u003c/strong>This building has strengthened walls, a new roof, a new generator, and is designed to withstand a 7.9 magnitude earthquake, and it can operate even when the electric grid is down,” said Dennis Herrera, general manager at the San Francisco Public Utilities Commission.\u003c/p>\n\u003cfigure id=\"attachment_11804757\" class=\"wp-caption aligncenter\" style=\"max-width: 1920px\">\u003cimg loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-11804757\" src=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2021/02/RS41727_earthquake-qut.jpg\" alt=\"Firefighters extinguish fire in the Marina District in San Francisco in October 1989 after the Loma Prieta earthquake erupted in the city.\" width=\"1920\" height=\"1294\" srcset=\"https://cdn.kqed.org/wp-content/uploads/sites/10/2021/02/RS41727_earthquake-qut.jpg 1920w, https://cdn.kqed.org/wp-content/uploads/sites/10/2021/02/RS41727_earthquake-qut-160x108.jpg 160w, https://cdn.kqed.org/wp-content/uploads/sites/10/2021/02/RS41727_earthquake-qut-800x539.jpg 800w, https://cdn.kqed.org/wp-content/uploads/sites/10/2021/02/RS41727_earthquake-qut-1020x687.jpg 1020w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\">\u003cfigcaption class=\"wp-caption-text\">Firefighters extinguish fires in the Marina District in San Francisco in October 1989 after the Loma Prieta earthquake erupted in the city. \u003ccite>(Jonathan Nourok/AFP/Getty Images)\u003c/cite>\u003c/figcaption>\u003c/figure>\n\u003cp>But the water won’t reach all parts of the city equally. In bracing for “the big one,” city officials admit that some parts of the city are more prepared than others.\u003c/p>\n\u003cp>Katie Miller, the director of water capital programs at the San Francisco Public Utilities Commission, said that the western and southern parts of the city, like the Sunset and Richmond districts, have fewer pipes connected to the city’s water supply. Most of the pipe is in older parts of the city, like downtown.\u003c/p>\n\u003cp>“We have already installed about two miles of the pipe, and we have additional funding available for another four miles in the Sunset. But we’re looking to future emergency safety and earthquake response bond funding that will come to the voters in 2026 or 2028,” she said.\u003c/p>\n\u003cp>Mayor Daniel Lurie attended Thursday’s demonstration and told attendees the city is “always preparing” for the “Big One.”\u003c/p>\n\u003cp>“We have made real progress. We’ve upgraded our emergency water systems, strengthened our fire stations, and improved public safety infrastructure,” he said.\u003c/p>\n\u003cp>\u003c/p>\n\u003c/div>\u003c/p>",
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"order": 8
},
"link": "/californiareport",
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"google": "https://podcasts.google.com/feed/aHR0cHM6Ly9mZWVkcy5tZWdhcGhvbmUuZm0vS1FJTkM1MDAyODE4NTgz",
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},
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"title": "The California Report Magazine",
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},
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"airtime": "SUN 1pm-2pm, TUE 10pm, WED 1am",
"meta": {
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"source": "City Arts & Lectures"
},
"link": "https://www.cityarts.net",
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"rss": "https://www.cityarts.net/feed/"
}
},
"closealltabs": {
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"order": 1
},
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"title": "Code Switch / Life Kit",
"info": "\u003cem>Code Switch\u003c/em>, which listeners will hear in the first part of the hour, has fearless and much-needed conversations about race. Hosted by journalists of color, the show tackles the subject of race head-on, exploring how it impacts every part of society — from politics and pop culture to history, sports and more.\u003cbr />\u003cbr />\u003cem>Life Kit\u003c/em>, which will be in the second part of the hour, guides you through spaces and feelings no one prepares you for — from finances to mental health, from workplace microaggressions to imposter syndrome, from relationships to parenting. The show features experts with real world experience and shares their knowledge. Because everyone needs a little help being human.\u003cbr />\u003cbr />\u003ca href=\"https://www.npr.org/podcasts/510312/codeswitch\">\u003cem>Code Switch\u003c/em> offical site and podcast\u003c/a>\u003cbr />\u003ca href=\"https://www.npr.org/lifekit\">\u003cem>Life Kit\u003c/em> offical site and podcast\u003c/a>\u003cbr />",
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"id": "commonwealth-club",
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"info": "The Commonwealth Club of California is the nation's oldest and largest public affairs forum. As a non-partisan forum, The Club brings to the public airwaves diverse viewpoints on important topics. The Club's weekly radio broadcast - the oldest in the U.S., dating back to 1924 - is carried across the nation on public radio stations and is now podcasting. Our website archive features audio of our recent programs, as well as selected speeches from our long and distinguished history. This podcast feed is usually updated twice a week and is always un-edited.",
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"source": "Commonwealth Club of California"
},
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"google": "https://podcasts.google.com/feed/aHR0cDovL3d3dy5jb21tb253ZWFsdGhjbHViLm9yZy9hdWRpby9wb2RjYXN0L3dlZWtseS54bWw",
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"title": "Forum",
"tagline": "The conversation starts here",
"info": "KQED’s live call-in program discussing local, state, national and international issues, as well as in-depth interviews.",
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"imageSrc": "https://cdn.kqed.org/wp-content/uploads/2024/04/Forum-Podcast-Tile-703x703-1.jpg",
"imageAlt": "KQED Forum with Mina Kim and Alexis Madrigal",
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"source": "kqed",
"order": 9
},
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"google": "https://podcasts.google.com/feed/aHR0cHM6Ly9mZWVkcy5tZWdhcGhvbmUuZm0vS1FJTkM5NTU3MzgxNjMz",
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"officialWebsiteLink": "http://freakonomics.com/",
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"meta": {
"site": "radio",
"source": "WNYC"
},
"link": "/radio/program/freakonomics-radio",
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"apple": "https://itunes.apple.com/us/podcast/freakonomics-radio/id354668519",
"tuneIn": "https://tunein.com/podcasts/WNYC-Podcasts/Freakonomics-Radio-p272293/",
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},
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"id": "fresh-air",
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"apple": "https://itunes.apple.com/WebObjects/MZStore.woa/wa/viewPodcast?s=143441&mt=2&id=214089682&at=11l79Y&ct=nprdirectory",
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"info": "A live production of NPR and WBUR Boston, in collaboration with stations across the country, Here & Now reflects the fluid world of news as it's happening in the middle of the day, with timely, in-depth news, interviews and conversation. Hosted by Robin Young, Jeremy Hobson and Tonya Mosley.",
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},
"hidden-brain": {
"id": "hidden-brain",
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"info": "Shankar Vedantam uses science and storytelling to reveal the unconscious patterns that drive human behavior, shape our choices and direct our relationships.",
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"airtime": "SUN 7pm-8pm",
"meta": {
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"source": "NPR"
},
"link": "/radio/program/hidden-brain",
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},
"how-i-built-this": {
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"title": "How I Built This with Guy Raz",
"info": "Guy Raz dives into the stories behind some of the world's best known companies. How I Built This weaves a narrative journey about innovators, entrepreneurs and idealists—and the movements they built.",
"imageSrc": "https://ww2.kqed.org/news/wp-content/uploads/sites/10/2018/05/howIBuiltThis.png",
"officialWebsiteLink": "https://www.npr.org/podcasts/510313/how-i-built-this",
"airtime": "SUN 7:30pm-8pm",
"meta": {
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"source": "npr"
},
"link": "/radio/program/how-i-built-this",
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"npr": "https://rpb3r.app.goo.gl/3zxy",
"apple": "https://itunes.apple.com/us/podcast/how-i-built-this-with-guy-raz/id1150510297?mt=2",
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},
"hyphenacion": {
"id": "hyphenacion",
"title": "Hyphenación",
"tagline": "Where conversation and cultura meet",
"info": "What kind of no sabo word is Hyphenación? For us, it’s about living within a hyphenation. Like being a third-gen Mexican-American from the Texas border now living that Bay Area Chicano life. Like Xorje! Each week we bring together a couple of hyphenated Latinos to talk all about personal life choices: family, careers, relationships, belonging … everything is on the table. ",
"imageSrc": "https://cdn.kqed.org/wp-content/uploads/2025/03/Hyphenacion_FinalAssets_PodcastTile.png",
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"officialWebsiteLink": "/podcasts/hyphenacion",
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"order": 15
},
"link": "/podcasts/hyphenacion",
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"spotify": "https://open.spotify.com/show/2p3Fifq96nw9BPcmFdIq0o?si=39209f7b25774f38",
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"rss": "https://feeds.megaphone.fm/KQINC2275451163"
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},
"jerrybrown": {
"id": "jerrybrown",
"title": "The Political Mind of Jerry Brown",
"tagline": "Lessons from a lifetime in politics",
"info": "The Political Mind of Jerry Brown brings listeners the wisdom of the former Governor, Mayor, and presidential candidate. Scott Shafer interviewed Brown for more than 40 hours, covering the former governor's life and half-century in the political game – and Brown has some lessons he'd like to share. ",
"imageSrc": "https://cdn.kqed.org/wp-content/uploads/2024/04/The-Political-Mind-of-Jerry-Brown-Podcast-Tile-703x703-1.jpg",
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"officialWebsiteLink": "/podcasts/jerrybrown",
"meta": {
"site": "news",
"source": "kqed",
"order": 18
},
"link": "/podcasts/jerrybrown",
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"apple": "https://itunes.apple.com/us/podcast/id1492194549",
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}
},
"latino-usa": {
"id": "latino-usa",
"title": "Latino USA",
"airtime": "MON 1am-2am, SUN 6pm-7pm",
"info": "Latino USA, the radio journal of news and culture, is the only national, English-language radio program produced from a Latino perspective.",
"imageSrc": "https://ww2.kqed.org/radio/wp-content/uploads/sites/50/2018/04/latinoUsa.jpg",
"officialWebsiteLink": "http://latinousa.org/",
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},
"link": "/radio/program/latino-usa",
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"apple": "https://itunes.apple.com/WebObjects/MZStore.woa/wa/viewPodcast?s=143441&mt=2&id=79681317&at=11l79Y&ct=nprdirectory",
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"rss": "https://feeds.npr.org/510016/podcast.xml"
}
},
"marketplace": {
"id": "marketplace",
"title": "Marketplace",
"info": "Our flagship program, helmed by Kai Ryssdal, examines what the day in money delivered, through stories, conversations, newsworthy numbers and more. Updated Monday through Friday at about 3:30 p.m. PT.",
"airtime": "MON-FRI 4pm-4:30pm, MON-WED 6:30pm-7pm",
"imageSrc": "https://cdn.kqed.org/wp-content/uploads/2024/04/Marketplace-Podcast-Tile-360x360-1.jpg",
"officialWebsiteLink": "https://www.marketplace.org/",
"meta": {
"site": "news",
"source": "American Public Media"
},
"link": "/radio/program/marketplace",
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},
"masters-of-scale": {
"id": "masters-of-scale",
"title": "Masters of Scale",
"info": "Masters of Scale is an original podcast in which LinkedIn co-founder and Greylock Partner Reid Hoffman sets out to describe and prove theories that explain how great entrepreneurs take their companies from zero to a gazillion in ingenious fashion.",
"airtime": "Every other Wednesday June 12 through October 16 at 8pm (repeats Thursdays at 2am)",
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"officialWebsiteLink": "https://mastersofscale.com/",
"meta": {
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"source": "WaitWhat"
},
"link": "/radio/program/masters-of-scale",
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"apple": "http://mastersofscale.app.link/",
"rss": "https://rss.art19.com/masters-of-scale"
}
},
"mindshift": {
"id": "mindshift",
"title": "MindShift",
"tagline": "A podcast about the future of learning and how we raise our kids",
"info": "The MindShift podcast explores the innovations in education that are shaping how kids learn. Hosts Ki Sung and Katrina Schwartz introduce listeners to educators, researchers, parents and students who are developing effective ways to improve how kids learn. We cover topics like how fed-up administrators are developing surprising tactics to deal with classroom disruptions; how listening to podcasts are helping kids develop reading skills; the consequences of overparenting; and why interdisciplinary learning can engage students on all ends of the traditional achievement spectrum. This podcast is part of the MindShift education site, a division of KQED News. KQED is an NPR/PBS member station based in San Francisco. You can also visit the MindShift website for episodes and supplemental blog posts or tweet us \u003ca href=\"https://twitter.com/MindShiftKQED\">@MindShiftKQED\u003c/a> or visit us at \u003ca href=\"/mindshift\">MindShift.KQED.org\u003c/a>",
"imageSrc": "https://cdn.kqed.org/wp-content/uploads/2024/04/Mindshift-Podcast-Tile-703x703-1.jpg",
"imageAlt": "KQED MindShift: How We Will Learn",
"officialWebsiteLink": "/mindshift/",
"meta": {
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"source": "kqed",
"order": 12
},
"link": "/podcasts/mindshift",
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"google": "https://podcasts.google.com/feed/aHR0cHM6Ly9mZWVkcy5tZWdhcGhvbmUuZm0vS1FJTkM1NzY0NjAwNDI5",
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}
},
"morning-edition": {
"id": "morning-edition",
"title": "Morning Edition",
"info": "\u003cem>Morning Edition\u003c/em> takes listeners around the country and the world with multi-faceted stories and commentaries every weekday. Hosts Steve Inskeep, David Greene and Rachel Martin bring you the latest breaking news and features to prepare you for the day.",
"airtime": "MON-FRI 3am-9am",
"imageSrc": "https://cdn.kqed.org/wp-content/uploads/2024/04/Morning-Edition-Podcast-Tile-360x360-1.jpg",
"officialWebsiteLink": "https://www.npr.org/programs/morning-edition/",
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"link": "/radio/program/morning-edition"
},
"onourwatch": {
"id": "onourwatch",
"title": "On Our Watch",
"tagline": "Deeply-reported investigative journalism",
"info": "For decades, the process for how police police themselves has been inconsistent – if not opaque. In some states, like California, these proceedings were completely hidden. After a new police transparency law unsealed scores of internal affairs files, our reporters set out to examine these cases and the shadow world of police discipline. On Our Watch brings listeners into the rooms where officers are questioned and witnesses are interrogated to find out who this system is really protecting. Is it the officers, or the public they've sworn to serve?",
"imageSrc": "https://cdn.kqed.org/wp-content/uploads/2024/04/On-Our-Watch-Podcast-Tile-703x703-1.jpg",
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"officialWebsiteLink": "/podcasts/onourwatch",
"meta": {
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"source": "kqed",
"order": 11
},
"link": "/podcasts/onourwatch",
"subscribe": {
"apple": "https://podcasts.apple.com/podcast/id1567098962",
"google": "https://podcasts.google.com/feed/aHR0cHM6Ly9mZWVkcy5ucHIub3JnLzUxMDM2MC9wb2RjYXN0LnhtbD9zYz1nb29nbGVwb2RjYXN0cw",
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"rss": "https://feeds.npr.org/510360/podcast.xml"
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},
"on-the-media": {
"id": "on-the-media",
"title": "On The Media",
"info": "Our weekly podcast explores how the media 'sausage' is made, casts an incisive eye on fluctuations in the marketplace of ideas, and examines threats to the freedom of information and expression in America and abroad. For one hour a week, the show tries to lift the veil from the process of \"making media,\" especially news media, because it's through that lens that we see the world and the world sees us",
"airtime": "SUN 2pm-3pm, MON 12am-1am",
"imageSrc": "https://ww2.kqed.org/radio/wp-content/uploads/sites/50/2018/04/onTheMedia.png",
"officialWebsiteLink": "https://www.wnycstudios.org/shows/otm",
"meta": {
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"source": "wnyc"
},
"link": "/radio/program/on-the-media",
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"apple": "https://itunes.apple.com/us/podcast/on-the-media/id73330715?mt=2",
"tuneIn": "https://tunein.com/radio/On-the-Media-p69/",
"rss": "http://feeds.wnyc.org/onthemedia"
}
},
"pbs-newshour": {
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