2002 USGS National Seismic Hazard Maps, Conterminous United States, Revised April 2003
This page contains probabilistic seismic hazard maps for the conterminous 48 States.
Six maps are presented: peak ground acceleration (pga), 5-Hz spectral acceleration, and 1-Hz spectral acceleration
(5% damping), each for 10%- and 2%-in-fifty-years probability of exceedance.
Explanation of April 2003 Revision
To view and print the postscript (ps) files from your browser, download, (free), the
GSview utility. To view and print the PDF
files from your browser, download, (free), the Adobe Acrobat Reader.
| Hazard Maps | ||
|---|---|---|
| Spectral Acceleration (%g) | Probability of Exceedance in 50 Years | |
| 2% | 10% | |
| Peak Ground Acceleration | [GIF | PDF | PS] | [GIF | PDF | PS] |
| 0.2 Second | [GIF | PDF | PS] | [GIF | PDF | PS] |
| 1.0 Second | [GIF | PDF | PS] | [GIF | PDF | PS] |
Although these maps 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 maps and related material nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith.
