Seismic-Hazard Maps for Alaska and the Aleutian Islands: PGA050

Metadata Updated: November 12, 2020

Probabilistic seismic hazard maps were prepared for Alaska portraying peak horizontal ground acceleration and horizontal spectral response acceleration for 0.2, 0.3, and 1.0 second periods with probabilities of exceedance of 10% in 50 years and 2% in 50 years. This particular data set is for peak horizontal acceleration with a 10% probability of exceedance in 50 years. All of the maps were prepared by combining hazard derived from spatially-smoothed historic seismicity with 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 site classes B and C. This data set represents the results of calculations of hazard curves for a grid of points with a spacing of 0.1 degrees in latitude and longitude. The grid of points were contoured to produce the final representation of the seismic-hazard.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Date June 13, 2016
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) January 1, 1999 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from DOI Open Data

Additional Metadata

Resource Type Dataset
Metadata Date June 13, 2016
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) January 1, 1999 (publication)
Responsible Party U.S. Geological Survey (Point of Contact)
Contact Email
Guid
Access Constraints Use Constraints: The data are not to be used for areas outside of Alaska and the Aleutian Islands., Access Constraints: none
Bbox East Long -130.0
Bbox North Lat 72.0
Bbox South Lat 50.0
Bbox West Long 170.0
Coupled Resource
Frequency Of Update asNeeded
Licence Although these data have been used by the U.S. Geological Survey, no warranty, expressed or implied is made by the USGS as to the accuracy of the data and related material nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith. Although these data have been used by the U.S. Geological Survey, no warranty, expressed or implied is made by the USGS as to the accuracy of the data and related material nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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