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107 datasets

CGS Seismic Hazards Program: Liquefaction Zones

Published by: California Department of Conservation
Last updated: Saturday, May 16, 2026
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...

CGS Liquefaction Zones

Published by: California Department of Conservation
Last updated: Saturday, May 16, 2026
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...

CGS Seismic Hazards Program: Unevaluated Areas

Published by: California Department of Conservation
Last updated: Saturday, May 16, 2026
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: Landslide Zones

Published by: California Department of Conservation
Last updated: Saturday, May 16, 2026
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 Alquist Priolo Fault Zones

Published by: California Department of Conservation
Last updated: Saturday, May 16, 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...

CGS Seismic Hazards Program: Alquist-Priolo Fault Hazard Zones

Published by: California Department of Conservation
Last updated: Saturday, May 16, 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...

CGS SHZ Unevaluated Areas

Published by: California Department of Conservation
Last updated: Saturday, May 16, 2026
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...

RegMapsLinks 20251120

Published by: California Department of Conservation
Last updated: Saturday, May 16, 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...

Map Sheet 48 (2025 update) - Ground Motion from PGV (10% in 50 years)

Published by: California Department of Conservation
Last updated: Saturday, May 16, 2026
File types: HTML, ARCGIS GEOSERVICES REST API

This image service is part of a collection of maps for PGA, PGV and spectral accelerations at 0.2 s (SA02), 1.0 s (SA10), and 2.0 s (SA20) to illustra...

Map Sheet 48 (2025 update) - Ground Motion from PGA (2% in 50 years)

Published by: California Department of Conservation
Last updated: Saturday, May 16, 2026
File types: HTML, ARCGIS GEOSERVICES REST API

This image service is part of a collection of maps for PGA, PGV and spectral accelerations at 0.2 s (SA02), 1.0 s (SA10), and 2.0 s (SA20) to illustra...