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Service 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 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.er.usgs.gov/publication/i2679,
http://pubs.er.usgs.gov/publication/ofr9936, and http://earthquake.usgs.gov/hazards/
Map Name: AK_1Hz_2PercentIn50Years
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1:1,128 (L1) (0)
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1:2,257 (L2) (6)
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Description:
Copyright Text: US Geological Survey National Seismic Hazard Mapping Program
Spatial Reference:
102100
(3857)
Single Fused Map Cache: false
Initial Extent:
XMin: -2.4682584664345372E7
YMin: 8026515.177440658
XMax: -9269860.027603071
YMax: 1.3064881713865384E7
Spatial Reference: 102100
(3857)
Full Extent:
XMin: -2.00375070671E7
YMin: 6183643.221900001
XMax: 2.0037507067199998E7
YMax: 1.1537127333499998E7
Spatial Reference: 102100
(3857)
Units: esriMeters
Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP
Document Info:
Title: AK 1Hz 2% in 50 years
Author: Ken Rukstales (rukstales@usgs.gov)
Comments: 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 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.er.usgs.gov/publication/i2679,
http://pubs.er.usgs.gov/publication/ofr9936, and http://earthquake.usgs.gov/hazards/
Subject: Horizontal Spectral Response Acceleration for 1.0-second Period with 2% Probability of Exceedance in 50 Years (1999)
Category:
Keywords: earthquake,hazard,1Hz,1.0-second,seismic,Alaska
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TextAntialiasingMode: Force
Supports Dynamic Layers: true
MaxRecordCount: 1000
MaxImageHeight: 4096
MaxImageWidth: 4096
Supported Query Formats: JSON, AMF, geoJSON
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Supports Datum Transformation: true
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