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    • Long-period transition period, TL, for the conterminous United States, Alaska, Hawaii, Puerto Rico and United States Virgin Islands, 2009 NEHRP.

    Metadata Updated: July 20, 2024

    For designing buildings and other structures to safely resist earthquakes, the 2009 NEHRP Recommended Seismic Provisions and the 2010 ASCE/SEI 7 Standard contain maps of long-period transition periods, TL. TL is based on the modal moment magnitude obtained from the disaggregation of a 2% probability of exceedance in 50 years hazard analysis for spectral acceleration at 2-second period for the conterminous United States and Alaska, and 1-second period for Hawaii. For the U.S. territories of Puerto Rico, U.S. Virgin Islands, Guam, Northern Mariana Islands, and American Samoa, the long-period transition, TL, is 12 seconds and no maps or shapefiles are provided in this data release.

    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.

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    Dates

    Metadata Created Date July 20, 2024
    Metadata Updated Date July 20, 2024

    Metadata Source

    Harvested from DOI EDI

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date July 20, 2024
    Metadata Updated Date July 20, 2024
    Publisher U.S. Geological Survey
    Maintainer
    @Id http://datainventory.doi.gov/id/dataset/f3ca0035d5994979af27abad81977c61
    Identifier USGS:60ec8d4ed34e3bf20b41fd8b
    Data Last Modified 20240625
    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://datainventory.doi.gov/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 1bc4b1e9-47cb-488f-b2f0-1057d5c0a0cf
    Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
    Harvest Source Title DOI EDI
    Metadata Type geospatial
    Old Spatial -161.0,17.5,-65.0,72.0
    Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
    Source Datajson Identifier True
    Source Hash c0d8325b4f8cc59f766464c08ae22aadd9e29f74e4cbbb2626861ca7b8ea97ca
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -161.0, 17.5, -161.0, 72.0, -65.0, 72.0, -65.0, 17.5, -161.0, 17.5}

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