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, including their related hazards, 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 produce more products and provide more services to more people than any other state survey. –“A​ltiora Petimus”​ ​(We Reach Higher​​)

 Featured Content



Official Map and Report Release AnnouncementsOfficial Map and Report Release AnnouncementsRecent releases of Official maps, reports and other publications of the California Geological Survey.
Maps and DataMaps and DataLooking for California geologic maps or GIS data? Start here.
LandslidesLandslidesInformation about landslides and landslide mapping.
TsunamisTsunamisGeneral tsunami information, tsunami preparedness, links to tsunami inundation maps, and more.
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.
Mineral Resources ProgramMineral Resources ProgramInformation about non-fuel mineral resources, naturally occurring mineral hazards, and active and historic mining activities throughout the state.
EarthquakesEarthquakesRecent and historic earthquakes, faults, earthquake probabilities, earthquake loss estimation, seismic hazard zonation, and more



Celebrate Geologic Map Day on October 18!Geologic Map Day focuses the attention of students, teachers, and the general public on the creation, study, uses, and significance of geologic maps. We invite you to explore our collection of digital geologic maps at, Link to DOC Maps: California Geology2019-10-01T07:00:00Z
Anniversary of the 1906 Great San Francisco Earthquake and Fire"At 5:12 A.M. on Wednesday, April 18th, 1906, the earth shook with a terrific force..." Discover gripping first-hand accounts of the 1906 San Francisco Earthquake in this excerpt from CGS Special Publication 125. [Eleven-megabyte PDF file], Special Publication 125 [EXCERPT]: The Centennial of the Great San Francisco Earthquake and Fire of 19062019-04-18T07:00:00Z
Seismic Hazard Zone Maps for Bay Area counties become officialCalifornia Geological Survey released five official Seismic Hazard Zones maps affecting communities in Contra Costa and San Mateo counties. The maps identify areas with potential for earthquake-induced landslides and liquefaction, and come with requirements for landowners and local governments.,
California State Geologist Position VacancyThe State Mining and Geology Board and the Department of Conservation are accepting applications for the position of State Geologist. The California State Geologist serves as the head of the California Geological Survey (CGS), one of the largest state surveys in the nation., California State Geologist Position Vacancy2019-01-17T20:00:00Z
Scientists on the Front LineGet the facts on post-fire debris flow, including the difference between mudflows, mudslides, and landslides. California Geological Survey scientists are part of CAL FIRE-assembled teams that assess the potential for flooding and debris flows in areas impacted by recent wildfires.,



2019 State Scientist Day2019-05-08T07:00:00Z2019-05-08T07:00:00Z, State Scientist Day

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