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41 datasets

Map Sheet 48 (2025 update) - MMI from PGA and mean M & R (10% in 50 years)

Published by: California Department of Conservation
Last updated: Thursday, May 14, 2026
File types: HTML, ARCGIS GEOSERVICES REST API

The California Geological Survey (CGS) Map Sheet 48 (MS48) provides a depiction of expected ground shaking intensity from future earthquakes across th...

Map Sheet 48 (2025 update) - MMI from PGA and mean M & R (2% in 50 years)

Published by: California Department of Conservation
Last updated: Thursday, May 14, 2026
File types: HTML, ARCGIS GEOSERVICES REST API

The California Geological Survey (CGS) Map Sheet 48 (MS48) provides a depiction of expected ground shaking intensity from future earthquakes across th...

Map Sheet 48 (2025 update) - MMI from PGA and Epsilon (10% in 50 years)

Published by: California Department of Conservation
Last updated: Thursday, May 14, 2026
File types: HTML, ARCGIS GEOSERVICES REST API

The California Geological Survey (CGS) Map Sheet 48 (MS48) provides a depiction of expected ground shaking intensity from future earthquakes across th...

Map Sheet 48 (2025 update) - MMI from PGA (10% in 50 years)

Published by: California Department of Conservation
Last updated: Thursday, May 14, 2026
File types: HTML, ARCGIS GEOSERVICES REST API

The California Geological Survey (CGS) Map Sheet 48 (MS48) provides a depiction of expected ground shaking intensity from future earthquakes across th...

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

Published by: California Department of Conservation
Last updated: Thursday, May 14, 2026
File types: HTML, ARCGIS GEOSERVICES REST API

The California Geological Survey (CGS) Map Sheet 48 (MS48) provides a depiction of expected ground shaking intensity from future earthquakes across th...

Special Report 230: Geologic Gems of California State Parks

Published by: California Department of Conservation
Last updated: Wednesday, May 13, 2026
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...

RegMapsLinks 20251120

Published by: California Department of Conservation
Last updated: Wednesday, May 13, 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: Wednesday, May 13, 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: Thursday, May 14, 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...

Fault Activity Map of California (2010)

Published by: California Department of Conservation
Last updated: Wednesday, May 13, 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...