Data Release for the 2008 National Seismic Hazard Model for the Conterminous U.S.

Seismicity catalogs, gridded seismic hazard curve data, gridded ground motion data, and mapped gridded ground motion values are available for the 2008 National Seismic Hazard Model for the Conterminous U.S.
(1) Seismicity catalogs are available for the western U.S. (in Mw) and central and eastern U.S. (in mb).
(2) Gridded (0.05 degree by 0.05 degree) ground motion values and hazard maps are available for peak ground acceleration (PGA) and 0.1, 0.2, 0.3, 0.5, 1.0, and 2.0 second spectral acceleration (SA) at probability levels of 2% in 50 years (annual probability of 0.000404), 5% in 50 years (annual probability of 0.001026), and 10% in 50 years (annual probability of 0.0021), assuming firm rock soil conditions at 760 m/s, for the conterminous U.S. (US). Additional periods (0.75s, 3s, 4s, and 5s) are available for the western U.S. (WUS). Data was derived from the probabilistic seismic hazard curves. (3) Gridded (0.1 degree by 0.1 degree) ground motion values and hazard maps are available for peak ground acceleration (PGA) and 0.1, 0.2, 0.3, 0.5, 1.0, and 2.0 second spectral acceleration (SA) at probability levels of 2% in 50 years (annual probability of 0.000404), 5% in 50 years (annual probability of 0.001026), and 10% in 50 years (annual probability of 0.0021), assuming hard rock site conditions at 2,000 m/s, for the central and eastern U.S. (CEUS). Data was derived from the probabilistic seismic hazard curves. (4) Gridded (0.05 degree by 0.05 degree) ground motion values and hazard maps are available for peak ground acceleration (PGA) and 0.1, 0.2, 0.3, 0.5, 0.75s, 1.0, 2.0, 3.0, 4.0, and 5.0 second spectral acceleration (SA) at probability levels of 2% in 50 years (annual probability of 0.000404), 5% in 50 years (annual probability of 0.001026), and 10% in 50 years (annual probability of 0.0021), for VS30 values of 1,150 m/s, 537 m/s, 360 m/s, 259 m/s, and 180 m/s, for the western U.S. (WUS). Data was derived from the probabilistic seismic hazard curves. Development of the 2008 National Seismic Hazard Model for the Conterminous U.S. is documented in the USGS Open-File Report 2008-1128 (https://doi.org/10.3133/ofr20081128).
This dataset is considered a legacy dataset. The original dataset was uploaded to the USGS website at the time of publication of the seismic hazard model (2008) but was later moved over the the USGS ScienceBase Catalog (2019). The original dataset was assumed to be complete and accurate, but may contain inconsistencies when compared to more recent, actively maintained datasets.

Data and Resources

Field Value
accessLevel public
bureauCode {010:12}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://ddi.doi.gov/usgs-data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier http://datainventory.doi.gov/id/dataset/usgs-5db892f2e4b0b0c58b5a51b6
metadata_type geospatial
modified 2020-08-18T00:00:00Z
old-spatial -125.0, 24.6, -65.0, 50.0
publisher U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash 46579a9edc3442c056bb13d80a1e70364fdcbc0682a613ddb851ea5d1d56af01
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-125.0, 24.6], [-125.0, 50.0], [ -65.0, 50.0], [ -65.0, 24.6], [-125.0, 24.6]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • conterminous-u-s
  • earthquake-hazards-program
  • ehp
  • geologic-hazards-science-center
  • ghsc
  • ground-motion
  • hazard-curve
  • hazard-map
  • national-seismic-hazard-model
  • national-seismic-hazard-model-project
  • nehrp-site-classes
  • nshm
  • nshmp
  • spectral-period
  • u-s-seismic-hazard-maps
  • usgs
  • usgs-5db892f2e4b0b0c58b5a51b6
isopen False
license_id notspecified
license_title License not specified
maintainer Shumway, Allison M.
maintainer_email ashumway@usgs.gov
metadata_created 2025-09-24T14:50:34.986260
metadata_modified 2025-09-24T14:50:34.986267
notes Seismicity catalogs, gridded seismic hazard curve data, gridded ground motion data, and mapped gridded ground motion values are available for the 2008 National Seismic Hazard Model for the Conterminous U.S. (1) Seismicity catalogs are available for the western U.S. (in Mw) and central and eastern U.S. (in mb). (2) Gridded (0.05 degree by 0.05 degree) ground motion values and hazard maps are available for peak ground acceleration (PGA) and 0.1, 0.2, 0.3, 0.5, 1.0, and 2.0 second spectral acceleration (SA) at probability levels of 2% in 50 years (annual probability of 0.000404), 5% in 50 years (annual probability of 0.001026), and 10% in 50 years (annual probability of 0.0021), assuming firm rock soil conditions at 760 m/s, for the conterminous U.S. (US). Additional periods (0.75s, 3s, 4s, and 5s) are available for the western U.S. (WUS). Data was derived from the probabilistic seismic hazard curves. (3) Gridded (0.1 degree by 0.1 degree) ground motion values and hazard maps are available for peak ground acceleration (PGA) and 0.1, 0.2, 0.3, 0.5, 1.0, and 2.0 second spectral acceleration (SA) at probability levels of 2% in 50 years (annual probability of 0.000404), 5% in 50 years (annual probability of 0.001026), and 10% in 50 years (annual probability of 0.0021), assuming hard rock site conditions at 2,000 m/s, for the central and eastern U.S. (CEUS). Data was derived from the probabilistic seismic hazard curves. (4) Gridded (0.05 degree by 0.05 degree) ground motion values and hazard maps are available for peak ground acceleration (PGA) and 0.1, 0.2, 0.3, 0.5, 0.75s, 1.0, 2.0, 3.0, 4.0, and 5.0 second spectral acceleration (SA) at probability levels of 2% in 50 years (annual probability of 0.000404), 5% in 50 years (annual probability of 0.001026), and 10% in 50 years (annual probability of 0.0021), for VS30 values of 1,150 m/s, 537 m/s, 360 m/s, 259 m/s, and 180 m/s, for the western U.S. (WUS). Data was derived from the probabilistic seismic hazard curves. Development of the 2008 National Seismic Hazard Model for the Conterminous U.S. is documented in the USGS Open-File Report 2008-1128 (https://doi.org/10.3133/ofr20081128). This dataset is considered a legacy dataset. The original dataset was uploaded to the USGS website at the time of publication of the seismic hazard model (2008) but was later moved over the the USGS ScienceBase Catalog (2019). The original dataset was assumed to be complete and accurate, but may contain inconsistencies when compared to more recent, actively maintained datasets.
num_resources 2
num_tags 25
title Data Release for the 2008 National Seismic Hazard Model for the Conterminous U.S.