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)



Protecting Forests for the Other California Gold: LumberProtecting Forests for the Other California Gold: LumberThe lumber industry has a long history in California. CGS' Timber Harvesting Plan Review unit and its regulatory partners help ensure that the state's vibrant lumber industry does its work in a way that protects the environment and keeps forests healthy.,
Help California Map Recent LandslidesHelp California Map Recent LandslidesThe California Recent Reported Landslides Database is an online map showing the locations, photos, and other attributes of recent landslides in California. This map depends on volunteer reports from people like you! Visit the database to learn more., Link to the web app
New Tsunami Hazard Maps Issued for Alameda, Monterey, San Mateo CountiesNew Tsunami Hazard Maps Issued for Alameda, Monterey, San Mateo CountiesToday the California Geological Survey releases interactive maps covering three more counties: Alameda, Monterey, and San Mateo. These maps allow users to enter an address to determine whether the property is within an area that may be subject to tsunami flooding.,



 Featured Content



Post-Wildfire Debris FlowsPost-Wildfire Debris FlowsA debris flow can strike with little warning. Learn how to recognize the potential and how to prepare for one.
Maps and DataMaps and DataLooking for California geologic maps or GIS data? Start here.
Tōhoku-oki Earthquake and Tsunami, March 11, 2011Tōhoku-oki Earthquake and Tsunami, March 11, 2011How an earthquake in Japan helped shape California's plan for the next tsunami
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.

 Contact Us

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

​​​​(916) 445-1825
 (916) 445-5718
 Email CGS Headquarters​​
 Email CGS Webmaster​​

All Offices and Programs

 ‭(Hidden)‬ CSS Overrides