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21 datasets

Fault Activity Map of California (2010)

Published by: California Department of Conservation
Last updated: Sunday, April 5, 2026
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 Alquist Priolo Fault Zones

Published by: California Department of Conservation
Last updated: Sunday, April 5, 2026
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...

i08 FaultLines SacramentoValley

Published by: California Department of Water Resources
Last updated: Sunday, April 5, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

This data set is a series of polylines denoting fault lines mapped in USGS Publication MF-1790, "Geologic Map of the Late Cenozoic Deposits of the Sac...

i08 FaultCrossings SWP ObservationPoints

Published by: California Department of Water Resources
Last updated: Sunday, April 5, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Fault Descriptions of locations crossing the California Aqueduct, Coastal Branch, North Bay Aqueduct, and South Bay Aqueduct. Taken from "State Water ...

i08 FaultCrossings StateWaterProject

Published by: California Department of Water Resources
Last updated: Sunday, April 5, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Approximate locations of faults crossing the California Aqueduct, Coastal Branch, North Bay Aqueduct, and South Bay Aqueduct. Taken from "State Water ...

CGS Seismic Hazards Program: Alquist-Priolo Fault Hazard Zones

Published by: California Department of Conservation
Last updated: Sunday, April 5, 2026
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...

RegMapsLinks 20251120

Published by: California Department of Conservation
Last updated: Sunday, April 5, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

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

Earthquake Zones of Required Investigation Maps and Reports

Published by: California Department of Conservation
Last updated: Sunday, April 5, 2026
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...

Regulatory Maps

Published by: California Department of Conservation
Last updated: Monday, April 6, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

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

Earthquake Zones of Required Investigation

Published by: California Department of Conservation
Last updated: Sunday, April 5, 2026
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...