{
 "culture": "en-US",
 "name": "AK1hz250_1999",
 "guid": "93B7D739-A056-423D-BAB5-CB4B21888501",
 "catalogPath": "",
 "snippet": "Horizontal Spectral Response Acceleration for 1.0-second Period with 2% Probability of Exceedance in 50 Years (1999)",
 "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.\n\nFor more information online visit:\nhttp://pubs.er.usgs.gov/publication/i2679,\nhttp://pubs.er.usgs.gov/publication/ofr9936, and \nhttp://earthquake.usgs.gov/hazards/\n",
 "summary": "Horizontal Spectral Response Acceleration for 1.0-second Period with 2% Probability of Exceedance in 50 Years (1999)",
 "title": "AK 1Hz 2% in 50 years",
 "tags": [
  "earthquake",
  "hazard",
  "1Hz",
  "1.0-second",
  "seismic",
  "Alaska"
 ],
 "type": "Map Service",
 "typeKeywords": [
  "Data",
  "Service",
  "Map Service",
  "ArcGIS Server"
 ],
 "thumbnail": "thumbnail/thumbnail.png",
 "url": "",
 "extent": [
  [
   -179.999988540289,
   48.4595039039792
  ],
  [
   179.999988541187,
   71.3904820642696
  ]
 ],
 "spatialReference": "WGS_1984_Web_Mercator_Auxiliary_Sphere",
 "accessInformation": "US Geological Survey National Seismic Hazard Mapping Program",
 "licenseInfo": ""
}