| snippet:
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Horizontal Spectral Response Acceleration for 1.0-second Period with 2% Probability of Exceedance in 50 Years (2014) |
| summary:
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Horizontal Spectral Response Acceleration for 1.0-second Period with 2% Probability of Exceedance in 50 Years (2014) |
| extent:
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[[-179.147340000274,17.8812419997711],[179.778465000033,71.3904820642696]] |
| accessInformation:
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US Geological Survey National Seismic Hazard Mapping Program |
| thumbnail:
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thumbnail/thumbnail.png |
| typeKeywords:
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["Data","Service","Map Service","ArcGIS Server"] |
| description:
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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 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/ |
| licenseInfo:
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| catalogPath:
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| title:
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US 1Hz 2% in 50 years |
| type:
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Map Service |
| url:
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| tags:
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["earthquake","hazard","1Hz","1.0-second","seismic"] |
| culture:
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en-US |
| name:
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US1hz250 |
| guid:
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013FB0A4-70AA-4EEA-9DFB-BC54A39451CB |
| spatialReference:
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WGS_1984_Web_Mercator_Auxiliary_Sphere |