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    • Modified Mercalli Intensity based on peak ground acceleration, with a 10% probability of exceedance in 50 years

    Metadata Updated: January 20, 2026

    A seismic hazard model for South America, based on a smoothed (gridded) seismicity model, a subduction model, a crustal fault model, and a ground motion model, has been produced by the U.S. Geological Survey. These models are combined to account for ground shaking from earthquakes on known faults as well as earthquakes on un-modeled faults. This data set represents the results of calculations of hazard curves for a grid of points with a spacing of 0.1 degrees in latitude and longitude. It represents Modified Mercalli Intensity (MMI) with a 10% probability of exceedance in 50 year. The maps and data were derived from PGA ground-motion conversions of Worden et al. (2012), and include soil amplification based on a topographic proxy of Allen and Wald (2009), and site amplification based on Seyhan and Stewart (2014) relationships.

    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 13, 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 13, 2026
    Metadata Updated Date January 20, 2026
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/USGS_59c99bb6e4b017cf313f1167
    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 20260119194142
    Harvest Object Id 96567afa-bc85-4291-b20d-f57e8018eb43
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": -85.05, -70.05, -85.05, 15.05, -19.95, 15.05, -19.95, -70.05, -85.05, -70.05}
    Source Datajson Identifier True
    Source Hash 85d808e83aece4ddf3291692d505e7f55e0f27086638f27cbadba6f22438a68d
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -85.05, -70.05, -85.05, 15.05, -19.95, 15.05, -19.95, -70.05, -85.05, -70.05}

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