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 (CGS) 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​​)

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Maps and DataMaps and DataLooking for California geologic maps or GIS data? Start here.
CGS PublicationsCGS PublicationsMaps, reports, data, guidebooks and more are available for download and purchase.
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
TsunamisTsunamisGeneral tsunami information, tsunami preparedness, links to tsunami inundation maps, and more

 

 

 

 

Anniversary of the 1933 Long Beach EarthquakeOn March 10, 1933, a large earthquake tore through the city of Long Beach, prompting the California State Legislature to pass the Field Act.https://www.conservation.ca.gov/cgs/Pages/Earthquakes/LongBeach.aspx, /cgs/Pages/Earthquakes/LongBeach.aspx2019-03-09T08:05:00Z
DOC Team Receives Prestigious CAL FIRE AwardSeveral staff recently earned CAL FIRE's for Superior Accomplishment award for their emergency post-fire mapping efforts during the tragic Thomas fire and ensuing mudslide in Montecito last year. Read more at our blog, Notes from the Field.https://calconservationblog.wordpress.com/2019/01/17/cal-fire-awards-cross-divisional-team-for-work-on-thomas-fire/, https://calconservationblog.wordpress.com/2019/01/17/cal-fire-awards-cross-divisional-team-for-work-on-thomas-fire/2019-01-17T19:00:00Z
Calling all educators! We want to hear from you. We are working to adapt our earth science materials into lesson plans and are looking for educators interested in providing feedback. https://www.conservation.ca.gov/educators, https://www.conservation.ca.gov/educators2019-01-17T01:00:00Z
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.https://www.conservation.ca.gov/index/Pages/Fact-sheets/Post-Fire-Debris-Flow-Facts.aspx, https://www.conservation.ca.gov/index/Pages/Fact-sheets/Post-Fire-Debris-Flow-Facts.aspx2019-01-16T20:00:00Z
CGS announces five new Preliminary Seismic Hazard Zone mapsSeismic Hazard Zones are areas that have potential for ground deformation caused by liquefaction or landslides. Areas affected by this release are in Contra Costa and San Mateo counties; click/tap for details. Public comments are due to the State Mining and Geology Board no later than Jan. 2, 2019.https://www.conservation.ca.gov/cgs/preliminary-releases, /cgs/preliminary-releases2018-10-04T15:00:00Z
CGS Scientists Map Burned AreaOne of the many services provided by the California Geological Survey is post-wildfire assessment of the potential for mudslides. Working with CAL FIRE, CGS sent a crew of geologists to Riverside County to map potential hazards following the recent Holy Fire. https://www.conservation.ca.gov/Documents/2015 CGS post-fire landslide reponse.pdf, http://www.conservation.ca.gov/Documents/2015 CGS post-fire landslide reponse.pdf2018-09-17T19:00:00Z

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