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snippet: Horizontal Spectral Response Acceleration for 1.0-second Period with 10% Probability of Exceedance in 50 Years (1999)
summary: Horizontal Spectral Response Acceleration for 1.0-second Period with 10% Probability of Exceedance in 50 Years (1999)
extent: [[-179.999988540289,48.5485127419872],[179.999988541187,71.3904820642696]]
accessInformation: US Geological Survey National Seismic Hazard Mapping Program
thumbnail: thumbnail/thumbnail.png
typeKeywords: ["Data","Service","Map Service","ArcGIS Server"]
description: Probabilistic seismic-hazard maps were prepared for Alaska 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.er.usgs.gov/publication/i2679, http://pubs.er.usgs.gov/publication/ofr9936, and http://earthquake.usgs.gov/hazards/
licenseInfo:
catalogPath:
title: AK 1Hz 10% in 50 years
type: Map Service
url:
tags: ["earthquake","hazard","1Hz","1.0-second","seismic","Alaska"]
culture: en-US
name: ak1hz050_1999
guid: 674C2304-7C52-4C4E-9FFD-F697E0F66CF9
spatialReference: WGS_1984_Web_Mercator_Auxiliary_Sphere