ds1hz050 5M
type: Dataset
keyword: earthquake
keyword: UNGGIM-Americas
keyword: AmeriGEOSS
keyword: seismic
keyword: 1.0-second
keyword: 1Hz
keyword: hazard
keyword: GEOSS
keyword: GEO
landing page: https://www.amerigeo.org/datasets/amerigeoss::ds1hz050-5m-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 1.0-second period with a 10 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: 2018-03-13T20:19:04+00:00
modified: 2018-11-09T02:45:09+00:00
publisher: AmeriGEOSS

ArcGIS Hub Dataset
type: Distribution
access URL: https://www.amerigeo.org/datasets/amerigeoss::ds1hz050-5m-1
format: HTML
issued: 2025-09-19T17:46:49.050949
modified: 2025-09-19T17:46:49.039083

CSV
type: Distribution
access URL: https://www.amerigeo.org/api/download/v1/items/8c5677ee1ef04456ae7ae6e4fb66f440/csv
format: CSV
issued: 2025-09-19T17:46:49.050955
modified: 2025-09-19T17:46:49.039375

OGC WMS
type: Distribution
access URL: https://earthquake.usgs.gov/arcgis/services/haz/US1hz050_2008/MapServer/WMSServer
format: OGC WMS
issued: 2025-09-19T17:46:49.050954
modified: 2025-09-19T17:46:49.039292

ArcGIS GeoService
type: Distribution
access URL: https://earthquake.usgs.gov/arcgis/rest/services/haz/US1hz050_2008/MapServer/111
format: ArcGIS GeoServices REST API
issued: 2025-09-19T17:46:49.050953
modified: 2025-09-19T17:46:49.039205

GeoJSON
type: Distribution
access URL: https://www.amerigeo.org/api/download/v1/items/8c5677ee1ef04456ae7ae6e4fb66f440/geojson
format: GeoJSON
issued: 2025-09-19T17:46:49.050957
modified: 2025-09-19T17:46:49.039536

KML
type: Distribution
access URL: https://www.amerigeo.org/api/download/v1/items/8c5677ee1ef04456ae7ae6e4fb66f440/kml
format: KML
issued: 2025-09-19T17:46:49.050958
modified: 2025-09-19T17:46:49.039614

Shapefile
type: Distribution
access URL: https://www.amerigeo.org/api/download/v1/items/8c5677ee1ef04456ae7ae6e4fb66f440/shapefile
format: ZIP
issued: 2025-09-19T17:46:49.050956
modified: 2025-09-19T17:46:49.039456