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)



Preliminary maps of proposed Seismic Hazard Zones and Earthquake Fault ZonesPreliminary maps of proposed Seismic Hazard Zones and Earthquake Fault ZonesToday the California Geological Survey released a new batch of maps and reports of proposed Seismic Hazard Zones and Alquist-Priolo Earthquake Fault Zones. Thus begins a 90-day public comment period for technical review comments that may have bearing on the proposed zones., Preliminary Release Announcements
New: Radon Potential in Western Nevada County (Special Report 258)New: Radon Potential in Western Nevada County (Special Report 258)SR 258 consists of a report and one plate (large map) identifying areas within western Nevada 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
New report: 2021 California Non-Fuel Mineral ProductionNew report: 2021 California Non-Fuel Mineral ProductionFor 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

 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



Strong Motion Data and ReportsStrong Motion Data and ReportsLinks to the Center for Engineering Strong Motion Data, Internet Quick Reports and Internet Data Reports, ShakeMaps, and SMIP Seminar information.
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.

California Geological Survey

 Contact Us

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