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)



New report: California Non-Fuel Mineral Production 2021New report: California Non-Fuel Mineral Production 2021For 2021, California remained one of the largest producers of non-fuel minerals in the United States. California ranked fourth, accounting for approximately 5.8 percent of the nation’s total. This report discusses production by commodity and summarizes current exploration., Link to the California Mineral Production page
New: Radon Potential in Western El Dorado County (Special Report 256)New: Radon Potential in Western El Dorado County (Special Report 256)SR 256 consists of a report and one plate (large map) identifying areas within western El Dorado County where geologic conditions are more likely to contribute to excessive indoor radon levels. The report documents the data and procedures used to develop the map., Publication Announcements
Latest maps of Earthquake Fault Zones and Seismic Hazard Zones become officialLatest maps of Earthquake Fault Zones and Seismic Hazard Zones become officialThe California Geological Survey released official maps and reports of Seismic Hazard Zones and Alquist-Priolo Earthquake Fault Zones affecting the counties of Contra Costa and Sonoma., Link to Publication Announcements page

 Upcoming Events



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!2024-01-01T08:00:00Z2026-01-01T08:00:00Z, Link to Public Calendar of Events page

 Featured Content



MapsMapsLooking for California geologic maps? Start here.
Publication AnnouncementsPublication AnnouncementsRelease announcements of maps, reports and other publications of the California Geological Survey.
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.
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.

California Geological Survey

 Contact Us

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