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    • Merged earthquake catalog without duplicates for the western U.S. (Catalog A inside UCERF3 zone and Catalog B outside UCERF3 zone)

    Metadata Updated: September 15, 2025

    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 merged earthquake catalog without duplicates for the western U.S. (Catalog A inside UCERF3 zone and Catalog B outside UCERF3 zone).

    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 September 13, 2025
    Metadata Updated Date September 15, 2025

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date September 13, 2025
    Metadata Updated Date September 15, 2025
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/usgs-5b1813c1e4b092d965219a1c
    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
    Harvest Object Id f2e83657-1abc-430e-a411-8371f3387491
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial -126.900, 23.711, -99.129, 50.987
    Source Datajson Identifier True
    Source Hash 46819c66fa2d3020eb6f13d0a64ff3ae951f2dd4028e8f7e38166ca83186fdd4
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -126.900, 23.711, -126.900, 50.987, -99.129, 50.987, -99.129, 23.711, -126.900, 23.711}

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