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18 datasets

CGS Mineral Hazards: Indoor Radon Potential Zones

Published by: California Department of Conservation
Last updated: Wednesday, September 17, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

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

Earthquake Zones of Required Investigation

Published by: California Department of Conservation
Last updated: Wednesday, September 17, 2025
File types: HTML, ARCGIS GEOSERVICES REST API

The California Earthquake Hazards Zone Application ("EQ Zapp") is an online map that allows anyone with a computer, tablet or smartphone to...

CGS Information Warehouse: Mineral Lands Classification

Published by: California Department of Conservation
Last updated: Wednesday, September 17, 2025
File types: HTML, ARCGIS GEOSERVICES REST API

Mineral Land Classification (MLC) studies are produced by the State Geologist as specified by the Surface Mining and Reclamation Act (SMARA, PRC 2710 ...

CGS Seismic Hazards Program: Landslide Zones

Published by: California Department of Conservation
Last updated: Wednesday, September 17, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML, TXT, XLSX, GPKG, GDB

This is a digital Seismic Hazard Zone Map presenting areas where liquefaction and landslides may occur during a strong earthquake. Three types of geol...

CGS Seismic Hazards Program: Alquist-Priolo Fault Hazard Zones

Published by: California Department of Conservation
Last updated: Wednesday, September 17, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML, TXT, XLSX, GPKG, GDB

This data set contains the Alquist-Priolo Earthquake Fault Zones as shown on the Official Alquist-Priolo Earthquake Fault Zones Maps. The dataset is c...

CGS Seismic Hazards Program: Unevaluated Areas

Published by: California Department of Conservation
Last updated: Wednesday, September 17, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML, TXT, XLSX, GPKG, GDB

This is a digital Seismic Hazard Zone Map presenting areas where liquefaction and landslides may occur during a strong earthquake. Three types of geol...

CGS Information Warehouse: Regulatory Maps

Published by: California Department of Conservation
Last updated: Wednesday, September 17, 2025
File types: HTML, ARCGIS GEOSERVICES REST API

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

CGS Seismic Hazards Program: Liquefaction Zones

Published by: California Department of Conservation
Last updated: Wednesday, September 17, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML, TXT, XLSX, GPKG, GDB

This is a digital Seismic Hazard Zone Map presenting areas where liquefaction may occur during a strong earthquake. Developers of properties falling w...