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CGS Seismic Hazards Program: Alquist-Priolo Fault Hazard Zones

This data set contains the Alquist-Priolo Earthquake Fault Zones as shown on the Official Alquist-Priolo Earthquake Fault Zones Maps. The dataset is comprised of polygons that form regulatory zone boundaries (Alquist-Priolo Earthquake Fault Zones). These features delineate areas where surface fault rupture previously has occurred, or where local topographic, geological, and geotechnical conditions indicate a potential for permanent ground displacements such that mitigation by avoidance as stated in Public Resources Code Section 2621.5 would be required.

Data files

Data title and descriptionAccess dataFile detailsLast updated

CSV

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CSV
03/13/25

Shapefile

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03/13/25

GeoJSON

DownloadGEOJSON
03/13/25

KML

DownloadKML
03/13/25

File Geodatabase

DownloadZIP
03/13/25

Feature Collection

DownloadTXT
03/13/25

Supporting files

Data title and descriptionAccess dataFile detailsLast updated

ArcGIS Hub Dataset

HTML
03/13/25

ArcGIS GeoService

ARCGIS GEOSERVICES REST API
02/20/25

Excel

XLSX
03/13/25

GeoPackage

GPKG
03/13/25

SQLite Geodatabase

GDB
03/13/25

API endpoint

Dataset Name

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Usage documentation