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

Metadata Updated: September 16, 2025

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 September 13, 2025
Metadata Updated Date September 16, 2025

Metadata Source

Harvested from DOI USGS DCAT-US

Additional Metadata

Resource Type Dataset
Metadata Created Date September 13, 2025
Metadata Updated Date September 16, 2025
Publisher U.S. Geological Survey
Maintainer
Identifier http://datainventory.doi.gov/id/dataset/usgs-59c99bdae4b017cf313f116b
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 4269d337-e64a-4efb-9604-7590baf92d6f
Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
Harvest Source Title DOI USGS DCAT-US
Metadata Type geospatial
Old Spatial -85.05, -70.05, -19.95, 15.05
Source Datajson Identifier True
Source Hash fb8559cb84d3d69041f95d7064db90d4845e405f7e6599142257ac5735d4a349
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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