Seismic Hazard Map for the United States - Direct Download

Metadata Updated: Oct 03, 2014

This map layer shows seismic hazard in the United States. The data represent a model showing the probability that ground motion will reach a certain level. This map layer shows peak horizontal ground acceleration (the fastest measured change in speed, for a particle at ground level that is moving horizontally due to an earthquake) with a 10% probability of exceedance in 50 years. Values are given in %g, where g is acceleration due to gravity, or 9.8 meters/second^2. The lines of equal hazard, which are the lines between the polygons, were determined by interpolating from a grid of equally spaced points in latitude and longitude. Each point was weighted based on the seismic hazard at that location. The grid spacing is 0.1 degrees for Alaska, 0.05 degrees for the conterminous United States, and 0.02degrees for Hawaii.

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 Jan 18, 2012
Metadata Created Date Oct 03, 2014
Metadata Updated Date Oct 03, 2014
Reference Date(s) Jan 01, 2012 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from 1997-2014 Edition of The National Atlas of the United States

Additional Metadata

Resource Type Dataset
Metadata Date Jan 18, 2012
Metadata Created Date Oct 03, 2014
Metadata Updated Date Oct 03, 2014
Reference Date(s) Jan 01, 2012 (publication)
Responsible Party U.S. Geological Survey (Point of Contact)
Contact Email
Access Constraints Use Constraints: Acknowledgment of the National Atlas of the United States of America and (or) the U.S. Geological Survey, National Seismic Hazard Mapping Project would be appreciated in products derived from these data., Access Constraints: None.
Bbox East Long -66
Bbox North Lat 72
Bbox South Lat 18
Bbox West Long 172
Coupled Resource
Frequency Of Update asNeeded
Guid
Harvest Object Id 4ac342ef-c7ec-4517-b584-3f347af9eb1e
Harvest Source Id af1597f1-e9d3-41f1-87aa-4aec2f273cdb
Harvest Source Title 1997-2014 Edition of The National Atlas of the United States
Licence Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made by the U.S. Geological Survey regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. No responsibility is assumed by the U.S. Geological Survey in the use of these data.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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