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CGS Seismic Hazards Program: Alquist-Priolo Fault Hazard Zones

Published by California Department of Conservation | State of California | Metadata Last Checked: July 09, 2025 | Last Modified: 2024-11-20T20:16:17.119Z
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.

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