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24 datasets

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

Published by: California Department of Conservation
Last updated: Monday, November 25, 2024
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, GEOJSON, ZIP, 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: Monday, November 25, 2024
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, GEOJSON, ZIP, 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: Monday, November 25, 2024
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, GEOJSON, ZIP, KML

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

CGS Mineral Hazards: Indoor Radon Potential Study Areas

Published by: California Department of Conservation
Last updated: Monday, November 25, 2024
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, GEOJSON, ZIP, 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: Monday, November 25, 2024
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, GEOJSON, ZIP, 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 Map Sheet 48: Fault-based seismic sources used in the Uniform California Earthquake Rupture Forecast, Version 3 (UCERF3)

Published by: California Department of Conservation
Last updated: Monday, November 25, 2024
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, GEOJSON, ZIP, KML

Data show fault-based seismic sources used in the time-independent component of the Uniform California Earthquake Rupture Forecast, Version 3 (UCERF3)...

CGS Information Warehouse: Tsunami Inundation Maps

Published by: California Department of Conservation
Last updated: Monday, November 25, 2024
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, GEOJSON, ZIP, KML

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

CGS Map Sheet 58: Deep-Seated Landslide Susceptibility

Published by: California Department of Conservation
Last updated: Monday, November 25, 2024
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, GEOJSON, ZIP, KML

The Susceptibility to Deep-Seated Landslides map covers the entire state of California and was originally published in May of 2011 as CGS Map Sheet 58...

CGS Information Warehouse: Regulatory Maps

Published by: California Department of Conservation
Last updated: Monday, November 25, 2024
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, GEOJSON, ZIP, KML

Alquist-Priolo Earthquake Fault Zoning Act (1972) and the Seismic Hazards Mapping Act (1990) direct the State Geologist to delineate regulatory "...

CGS Mineral Hazards: Indoor Radon Potential Zones

Published by: California Department of Conservation
Last updated: Monday, November 25, 2024
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, GEOJSON, ZIP, KML

This digital layer contains polygons (vector format) of portions of California designated as having high, moderate, low, or unknown potential for home...