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25 datasets

Geologic Map of California (2010)

Published by: California Department of Conservation
Last updated: Wednesday, April 2, 2025
File types: HTML, ARCGIS GEOSERVICES REST API

This edition of the Geologic Map of California was prepared in recognition of the California Geological Survey's 150th Anniversary. It is an all-digit...

Special Report 230: Geologic Gems of California State Parks

Published by: California Department of Conservation
Last updated: Sunday, March 30, 2025
File types: HTML, ARCGIS GEOSERVICES REST API

California is a veritable treasure chest of nationally acclaimed natural landmarks and much adored scenery. This geologic legacy on display in the lan...

CGS Map Sheet 48: Shear-wave Velocity in Upper 30m of Surficial Geology (Vs30)

Published by: California Department of Conservation
Last updated: Wednesday, April 2, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

This dataset represents simplified geologic units that have been correlated to the time-averaged seismic shear-wave velocity in the upper 30 meters of...

CGS Map Sheet 48: Earthquake Shaking Potential for California (revised 2016)

Published by: California Department of Conservation
Last updated: Sunday, March 30, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

The California Geological Survey published maps of “Earthquake Shaking Potential for California” in 1999 and has revised the maps following each updat...

CGS Information Warehouse: Landslide Maps and Reports

Published by: California Department of Conservation
Last updated: Wednesday, April 2, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Since the 1960's, the California Geological Survey (CGS) has produced numerous maps that show landslide features and delineate potential slope-stabili...

Fault Activity Map of California (2010)

Published by: California Department of Conservation
Last updated: Wednesday, April 2, 2025
File types: HTML, ARCGIS GEOSERVICES REST API

"This digital database contains the faults shown on the Fault Activity Map of California by Charles W. Jennings and William A. Bryant published i...

CGS Mineral Hazards: Indoor Radon Potential Study Areas

Published by: California Department of Conservation
Last updated: Wednesday, April 2, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Study area boundaries for indoor radon potential conducted by the California Geological Survey....

CGS Map Sheet 48: Historic Earthquakes, 1769 to 2015 - California (Magnitude 5.0-plus)

Published by: California Department of Conservation
Last updated: Wednesday, April 2, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Epicenters of known M≥5 earthquakes from 1769 to 2016 are shown for California and a 100 km area bordering the state. Earthquakes are grouped by: M = ...

CGS Information Warehouse: Tsunami Inundation Maps

Published by: California Department of Conservation
Last updated: Thursday, April 3, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Produced collectively by tsunami modelers, geologic hazard mapping specialists, and emergency planning scientists from the University of Southern Cali...

California Landslide Inventory and Deep Landslide Susceptiblity

Published by: California Department of Conservation
Last updated: Monday, March 31, 2025
File types: HTML, ARCGIS GEOSERVICES REST API

California Landslide InventoryThe statewide landslide map database shows many of the landslides mapped by CGS and others over the past 50 years. Each ...