KML
type: Distribution
access URL: https://prep-response-portal.napsgfoundation.org/api/download/v1/items/be9a9b9cd0b340e9a919e30c3b3e4ff9/kml
format: KML
issued: 2025-09-19T01:29:26.940655
modified: 2025-09-19T01:29:26.933711

UScounty arcL10
type: Dataset
keyword: earthquake
keyword: 0.2-second
keyword: seismic
keyword: 5Hz
keyword: hazard
landing page: https://prep-response-portal.napsgfoundation.org/datasets/geoplatform::uscounty-arcl10-1
description: Probabilistic seismic-hazard maps were prepared for the conterminous United States portraying peak horizontal acceleration and horizontal spectral response acceleration for 0.2- and 1.0-second periods with probabilities of exceedance of 10 percent in 50 years and 2 percent in 50 years. This particular data set is for horizontal spectral response acceleration for 0.2-second period with a 2 percent probability of exceedance in 50 years. All of the maps were prepared by combining the hazard derived from spatially smoothed historic seismicity with the hazard from fault-specific sources. The acceleration values contoured are the random horizontal component. The reference site condition is firm rock, defined as having an average shear-wave velocity of 760 m/sec in the top 30 meters corresponding to the boundary between NEHRP (National Earthquake Hazards Reduction program) site classes B and C. For more information online visit: http://pubs.usgs.gov/sim/3195/, http://pubs.usgs.gov/of/2008/1128/, and http://earthquake.usgs.gov/hazards/
issued: 2018-03-14T12:58:22+00:00
modified: 2025-09-19T12:26:54.255000+00:00
publisher: GeoPlatform ArcGIS Online

OGC WMS
type: Distribution
access URL: https://earthquake.usgs.gov/arcgis/services/haz/US5hz250_2014/MapServer/WMSServer
format: OGC WMS
issued: 2025-09-19T01:29:26.940651
modified: 2025-09-19T01:29:26.933392

CSV
type: Distribution
access URL: https://prep-response-portal.napsgfoundation.org/api/download/v1/items/be9a9b9cd0b340e9a919e30c3b3e4ff9/csv
format: CSV
issued: 2025-09-19T01:29:26.940652
modified: 2025-09-19T01:29:26.933474

ArcGIS GeoService
type: Distribution
access URL: https://earthquake.usgs.gov/arcgis/rest/services/haz/US5hz250_2014/MapServer/74
format: ArcGIS GeoServices REST API
issued: 2025-09-19T01:29:26.940649
modified: 2025-09-19T01:29:26.933307

GeoJSON
type: Distribution
access URL: https://prep-response-portal.napsgfoundation.org/api/download/v1/items/be9a9b9cd0b340e9a919e30c3b3e4ff9/geojson
format: GeoJSON
issued: 2025-09-19T01:29:26.940654
modified: 2025-09-19T01:29:26.933632

ArcGIS Hub Dataset
type: Distribution
access URL: https://prep-response-portal.napsgfoundation.org/datasets/geoplatform::uscounty-arcl10-1
format: HTML
issued: 2025-09-19T01:29:26.940647
modified: 2025-09-19T01:29:26.933192

Shapefile
type: Distribution
access URL: https://prep-response-portal.napsgfoundation.org/api/download/v1/items/be9a9b9cd0b340e9a919e30c3b3e4ff9/shapefile
format: ZIP
issued: 2025-09-19T01:29:26.940653
modified: 2025-09-19T01:29:26.933553