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Data Release for the 2018 Update of the U.S. National Seismic Hazard Model

Metadata Updated: October 28, 2023

The 2018 Update of the U.S. National Seismic Hazard Model defines the potential for earthquake ground shaking for various probability levels across the conterminous United States and is applied in seismic provisions of building codes, insurance rate structures, risk assessments, and other public policy. The updated model represents an assessment of the best available science in earthquake hazards and incorporates new findings on earthquake ground shaking, seismicity, and long-period amplification over deep sedimentary basins. The new model represents an update of the seismic hazard model; previous versions were developed in 1996, 2002, 2008, and 2014. The output from the National Seismic Hazard Model is a suite of seismic hazard curves calculated on a grid of latitude/longitude locations across the conterminous United States that describe the annual frequency of exceeding a set of ground motions. Hazard curves and probabilistic hazard data and maps for VS30 equal to 760 m/s and 260 m/s (NEHRP site class B/C and D), for 0.2, 1.0, and 5.0 second periods, as well as PGA, are available for download in the "Child Items". Maps depict probabilistic ground motions with a 2 percent, 5 percent, and 10 percent probability of exceedance in 50 years. Spectral accelerations are calculated for 5 percent damped linear elastic oscillators. Additional maps and data portraying the chance of damaging earthquake shaking, probabilistic Modified Mercalli Intensity, the declustered seismicity catalog, and data used for basin amplification are also available for download in the "Child Items".

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


Metadata Created Date June 1, 2023
Metadata Updated Date October 28, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 28, 2023
Publisher U.S. Geological Survey
Identifier USGS:5cbf47c4e4b0c3b00664fdef
Data Last Modified 20191205
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 92d36360-1f1c-420c-8b03-402feb6be648
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -125.0,24.4,-65.0,50.0
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 1cdc12f0157bf00c5f430d6ece783f7ca4b9c9d32eceace041d93de04868791a
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -125.0, 24.4, -125.0, 50.0, -65.0, 50.0, -65.0, 24.4, -125.0, 24.4}

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