Mt. Soledad landslide in La Jolla, CA - October 2007

California Geological Survey

​​​​​​​​​​​​​​​​​​​​California is the most geologically diverse and the second most seismically active state in the USA. The California Geological Survey provides scientific products and services about the state's geology, seismology and mineral resources that affect the health, safety, and business interests of the people of California. We are one of the oldest geological surveys in the nation, and today provide products and services to more people than any other state survey. –“A​ltiora Petimus”​ ​(We Reach Higher​​)

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TsunamisTsunamisGeneral tsunami information, tsunami preparedness, links to tsunami inundation maps, and more.
Official Map and Report Release AnnouncementsOfficial Map and Report Release AnnouncementsRecent releases of official maps, reports and other publications of the California Geological Survey.
LandslidesLandslidesInformation about landslides and landslide mapping.
Maps and DataMaps and DataLooking for California geologic maps or GIS data? Start here.
Earthquake Data and ReportsEarthquake Data and ReportsLinks to the Center for Engineering Strong Motion Data, Internet Quick Reports and Internet Data Reports, ShakeMaps, and SMIP Seminar information.
Earthquakes and FaultsEarthquakes and FaultsRecent and historic earthquakes, faults, earthquake probabilities, earthquake loss estimation, seismic hazard zonation, and more



California Geological Survey Issues New Tsunami Maps for Humboldt CountyCalifornia Geological Survey Issues New Tsunami Maps for Humboldt CountyCGS today released two tsunami hazard maps for Humboldt County. One shows potential tsunami inundation – how far inland a surge of ​seawater might go in a worst-case scenario event. The other map shows where evacuees from a pending tsunami should go to ensure their safety.,
CGS Shares Expertise During Nevada’s Largest Temblor in 65 YearsCGS Shares Expertise During Nevada’s Largest Temblor in 65 YearsThe largest earthquake in Nevada in 65 years drew the attention at the California Geological Survey – not because it caused significant damage – but because it helps paints a clearer picture of what’s going on under the Earth’s surface in our state.,
Senior Precision Electronics Specialist exam is onlineSenior Precision Electronics Specialist exam is onlineThe SENIOR PRECISION ELECTRONICS SPECIALIST examination is now open at Electronic specialists play a critical role in our earthquake engineering program. Visit for eligibility requirements, instructions, and more. The exam cutoff date is Dec. 31, 2020., Link to exam posting at CalCareers

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​8​01 K Street, MS 12-30
Sacramento, CA 95814

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