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Seismic Hazards

Dates

Publication Date

Summary

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 [...]

Attached Files

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Shapefile: Seismic_Hazards.zip
Seismic_Hazards.shp 5.23 MB
Seismic_Hazards.dbf 341.4 KB
Seismic_Hazards.shx 26.34 KB
Seismic_Hazards.prj 145 Bytes
Seismic_Hazards.shp.xml
Potential Metadata Source

View
136.94 KB
Seismic_Hazards.sbn 30.99 KB
Seismic_Hazards.sbx 772 Bytes

Purpose

This map summarizes the quantitative information, available from geologic and geophysical sources, about seismic ground motion hazard in the United States. The data are intended for geographic display and analysis at the national level, and for large regional areas. The data should be displayed and analyzed at scales appropriate for 1:2,000,000-scale data. No responsibility is assumed by the U.S. Geological Survey or the National Atlas of the United States in the use of these data.

Map

Spatial Services

ScienceBase WMS

ScienceBase WFS

Communities

  • USGS Multi-Hazards Demonstration Project

Tags

Provenance

<p> Rukstales, Kenneth S. (compiler), Rukstales, Kenneth S. (compiler)</p>

Additional Information

Alternate Titles

  • Seismic_Hazards

Shapefile Extension

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