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    • Declustered earthquake catalog without duplicates for the western U.S.

    Metadata Updated: January 20, 2026

    A methodology has been developed at the U.S. Geological Survey (USGS) for making earthquake catalogs for seismic hazard analysis. A new catalog is assembled from several preexisting catalogs. Uniform moment magnitudes and related parameters for estimating unbiased seismicity rates are calculated. Duplicates, explosions, mining-related earthquakes, and induced earthquakes are flagged, and the catalog is declustered. Distinct catalogs are made for the central and eastern U.S. and the western U.S. This data set is the declustered catalog without duplicates for the western U.S.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date January 11, 2026
    Metadata Updated Date January 20, 2026

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 11, 2026
    Metadata Updated Date January 20, 2026
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/USGS_5b18188be4b092d965219acf
    Data Last Modified 2020-08-18T00:00:00Z
    Category geospatial
    Public Access Level public
    Bureau Code 010:12
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://ddi.doi.gov/usgs-data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Datagov Dedupe Retained 20260120063953
    Harvest Object Id 6da3c46e-b3e1-4c0e-b455-3bec35be6450
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": -126.900, 23.711, -126.900, 50.987, -99.177, 50.987, -99.177, 23.711, -126.900, 23.711}
    Source Datajson Identifier True
    Source Hash dbd0d2e0e946b7ccd6bfaa2678d0086b94c31eab03f42a7cef6c4c3d504d37ea
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -126.900, 23.711, -126.900, 50.987, -99.177, 50.987, -99.177, 23.711, -126.900, 23.711}

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