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

California Geological Survey

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​The California Geological Survey is one of the oldest geological surveys in the nation. Our mission is to provide scientific products and services about the state's geology, seismology, and minerals that affect the health, safety, and business interests of the people of California. –“Altiora Petimus” (We Reach Higher)

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SR 253: PCC Aggregate in the Western Ventura-Simi Production-Consumption RegionsSR 253: PCC Aggregate in the Western Ventura-Simi Production-Consumption RegionsSpecial Report 253 is the second update Mineral Land Classification report for Portland cement concrete (PCC) aggregate in Ventura County. SR 253 reevaluates PCC aggregate resources, permitted reserves, past production, and includes an updated 50-year projection of demand in the WVS P-C Regions.https://www.conservation.ca.gov/cgs/publications/releases, /cgs/publications/releaseshttps://www.conservation.ca.gov/cgs/Lists/News/DispForm.aspx?ID=1252022-11-23T00:30:00Z
Did You Feel It? M5.1 Quake East of San Jose Reminds Californians to Be PreparedDid You Feel It? M5.1 Quake East of San Jose Reminds Californians to Be PreparedBookmark the California Geological Survey's earthquake page for preparation resources - including what to do before, during, and after a quake. Aftershocks should be expected over the next hours to days, and with every earthquake comes a small chance of it being followed by a larger earthquake.https://www.conservation.ca.gov/cgs/earthquakes, https://www.conservation.ca.gov/cgs/earthquakeshttps://www.conservation.ca.gov/Lists/News/DispForm.aspx?ID=2132022-10-25T19:00:00Z
New Tsunami Hazard Area Maps for Seven CountiesNew Tsunami Hazard Area Maps for Seven CountiesToday the CGS issued new Tsunami Hazard Area (THA) maps for the counties of San Diego, Ventura, Santa Cruz, Marin, Sonoma, Napa, and Solano. This release completes THA mapping for the entire coast of California.https://www.conservation.ca.gov/cgs/tsunami, Take me therehttps://www.conservation.ca.gov/cgs/Lists/News/DispForm.aspx?ID=1242022-10-07T14:00:00Z

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Calendar of geology-related events and anniversariesCalendar of geology-related events and anniversariesSubscribe to our Public Calendar of Events and never miss an important date: Anniversaries of major earthquakes and tsunamis · The Great Shakeout · SMIP Seminar...and more!2021-01-01T08:00:00Z2026-01-01T08:00:00Zhttps://www.conservation.ca.gov/cgs/events, Link to Public Calendar of Events page


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Publications of the California Geological SurveyPublications of the California Geological SurveyOfficial directory of publications we've produced from the late 19th century to the present.
Publication AnnouncementsPublication AnnouncementsRelease announcements of maps, reports and other publications of the California Geological Survey.
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.

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California Geological Survey
715 P Street, MS 1901
Sacramento, CA 95814