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    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

    RegMapsLinks 20251120

    Metadata Updated: January 23, 2026

    The Alquist-Priolo Earthquake Fault Zoning Act (1972) and the Seismic Hazards Mapping Act (1990) direct the State Geologist to delineate regulatory "Zones of Required Investigation" to reduce the threat to public health and safety and to minimize the loss of life and property posed by earthquake-triggered ground failures. Cities and counties affected by the zones must regulate certain development "projects" within them. These Acts also require sellers of real property (and their agents) within a mapped hazard zone to disclose at the time of sale that the property lies within such a zone. 

    Fault Evaluation Reports are available for those areas covered by a Regulatory Map however there are reports available for areas outside the Regulatory map boundary. For a complete set of maps available for purchase on CD please contact the CGS Library.

    Access & Use Information

    Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: See this page for license information.

    Downloads & Resources

    Dates

    Metadata Created Date January 23, 2026
    Metadata Updated Date January 23, 2026

    Metadata Source

    Harvested from State of California

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 23, 2026
    Metadata Updated Date January 23, 2026
    Publisher California Department of Conservation
    Maintainer
    Identifier b7f4f391-b3d0-4cd1-9a23-fddf578af54e
    Data First Published 2024-06-19T14:04:18.000Z
    Data Last Modified 2025-11-19T22:23:45.251Z
    Category Natural Resources
    Public Access Level public
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id d430a038-6cc1-48d1-89eb-480913008a41
    Harvest Source Id 3ba8a0c1-5dc2-4897-940f-81922d3cf8bc
    Harvest Source Title State of California
    License http://www.opendefinition.org/licenses/cc-by
    Source Datajson Identifier True
    Source Hash 80a3d636985fcfe271c88fb527eb544cf4ababaf2410afa91bfbee96dd94bd05
    Source Schema Version 1.1

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