SEISMIC-HAZARD MAPS FOR THE CONTERMINOUS UNITED STATES
By Mark D. Petersen, Arthur D. Frankel, Stephen C. Harmsen, Charles S. Mueller, Kathleen M. Haller, Russell L. Wheeler, Robert L Wesson,
Yuehua Zeng, Oliver S. Boyd, David M. Perkins, Nicolas Luco, Edward H. Field, Chrisopher J. Wills, and Kenneth S. Rukstales
2011
U. S. Geological Survey Scientific Investigations Map 3195
ABSTRACT
Probabilistic seismic-hazard maps were prepared for the conterminous United States 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. 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/s in the top 30 meters corresponding to the boundary between NEHRP (National Earthquake Hazards Reduction program)
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 0.05 degrees in latitude and
longitude. The grid of points were contoured to produce the final representation of the seismic-hazard.
These maps are intended to summarize the available quantitative information about seismic ground motion hazard for the conterminous United States
from geologic and geophysical source
DISCLAIMERS
This database, identified as SIM 3195, has been approved for release and publication by the Director of the USGS. Although this database has been
subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review.
Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from
its authorized or unauthorized use.
Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made
regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute
any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein.
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text.
Permission to reproduce copyrighted items for other than personal use must be secured from the copyright owner.
CONTENT
00readme.txt
SIM3195_sheet1.pdf--map of peak horizontal acceleration with 10% probability of exceedance in 50 years
SIM3195_sheet2.pdf--map of peak horizontal acceleration with 2% probability of exceedance in 50 years
SIM3195_sheet3.pdf--map of horizontal spectral response acceleration for 0.2-second period with 10% probability of exceedance in 50 years
SIM3195_sheet4.pdf--map of horizontal spectral response acceleration for 0.2-second period with 2% probability of exceedance in 50 years
SIM3195_sheet5.pdf--map of horizontal spectral response acceleration for 1.0-second period with 10% probability of exceedance in 50 years
SIM3195_sheet6.pdf--map of horizontal spectral response acceleration for 1.0-second period with 2% probability of exceedance in 50 years
GIS data
SIM3195-1.zip
uspga050arc.shp (.dbf/.prj./.sbn/.sbx/.shx)
uspga050poly.shp (.dbf/.prj./.sbn/.sbx/.shx)
uspga050pts.shp (.dbf/.prj./.sbn/.sbx/.shx)
SIM3195-2.zip
uspga250arc.shp (.dbf/.prj./.sbn/.sbx/.shx)
uspga250poly.shp (.dbf/.prj./.sbn/.sbx/.shx)
uspga250pts.shp (.dbf/.prj./.sbn/.sbx/.shx)
SIM3195-3.zip
us5hz050arc.shp (.dbf/.prj./.sbn/.sbx/.shx)
us5hz050poly.shp (.dbf/.prj./.sbn/.sbx/.shx)
us5hz050pts.shp (.dbf/.prj./.sbn/.sbx/.shx)
SIM3195-4.zip
us5hz250arc.shp (.dbf/.prj./.sbn/.sbx/.shx)
us5hz250poly.shp (.dbf/.prj./.sbn/.sbx/.shx)
us5hz250pts.shp (.dbf/.prj./.sbn/.sbx/.shx)
SIM3195-5.zip
us1hz050arc.shp (.dbf/.prj./.sbn/.sbx/.shx)
us1hz050poly.shp (.dbf/.prj./.sbn/.sbx/.shx)
us1hza050pts.shp (.dbf/.prj./.sbn/.sbx/.shx)
SIM3195-6.zip
us1hz250arc.shp (.dbf/.prj./.sbn/.sbx/.shx)
us1hz250poly.shp (.dbf/.prj./.sbn/.sbx/.shx)
us1hza250pts.shp (.dbf/.prj./.sbn/.sbx/.shx)
Metadata
metadata.zip
uspga050poly.met--metadata for peak horizontal acceleration with 10% probability of exceedance in 50 years, polygons
uspga250poly.met--metadata for peak horizontal acceleration with 2% probability of exceedance in 50 years, polygons
us5hz050poly.met--metadata for horizontal spectral response acceleration for 0.2-second period with 10% probability of exceedance in 50 years, polygons
us5hz250poly.met--metadata for horizontal spectral response acceleration for 0.2-second period with 2% probability of exceedance in 50 years, polygons
us1hz050poly.met--metadata for horizontal spectral response acceleration for 1.0-second period with 10% probability of exceedance in 50 years, polygons
us1hz250poly.met--metadata for horizontal spectral response acceleration for 1.0-second period with 2% probability of exceedance in 50 years, polygons
uspga050arc.met--metadata for peak horizontal acceleration with 10% probability of exceedance in 50 years, arcs
uspga250arc.met--metadata for peak horizontal acceleration with 2% probability of exceedance in 50 years, arcs
us5hz050arc.met--metadata for horizontal spectral response acceleration for 0.2-second period with 10% probability of exceedance in 50 years, arcs
us5hz250arc.met--metadata for horizontal spectral response acceleration for 0.2-second period with 2% probability of exceedance in 50 years, arcs
us1hz050arc.met--metadata for horizontal spectral response acceleration for 1.0-second period with 10% probability of exceedance in 50 years, arcs
us1hz250arc.met--metadata for horizontal spectral response acceleration for 1.0-second period with 2% probability of exceedance in 50 years, arcs
uspga050pts.met--metadata for peak horizontal acceleration with 10% probability of exceedance in 50 years, points
uspga250pts.met--metadata for peak horizontal acceleration with 2% probability of exceedance in 50 years, points
us5hz050pts.met--metadata for horizontal spectral response acceleration for 0.2-second period with 10% probability of exceedance in 50 years, points
us5hz250pts.met--metadata for horizontal spectral response acceleration for 0.2-second period with 2% probability of exceedance in 50 years, points
us1hz050pts.met--metadata for horizontal spectral response acceleration for 1.0-second period with 10% probability of exceedance in 50 years, points
us1hz250pts.met--metadata for horizontal spectral response acceleration for 1.0-second period with 2% probability of exceedance in 50 years, points
Shapefiles
uspga050poly.shp--peak horizontal acceleration with 10% probability of exceedance in 50 years, polygons
uspga250poly.shp--peak horizontal acceleration with 2% probability of exceedance in 50 years, polygons
us5hz050poly.shp--horizontal spectral response acceleration for 0.2-second period with 10% probability of exceedance in 50 years, polygons
us5hz250poly.shp--horizontal spectral response acceleration for 0.2-second period with 2% probability of exceedance in 50 years, polygons
us1hz050poly.shp--horizontal spectral response acceleration for 1.0-second period with 10% probability of exceedance in 50 years, polygons
us1hz250poly.shp--horizontal spectral response acceleration for 1.0-second period with 2% probability of exceedance in 50 years, polygons
uspga050arc.shp--peak horizontal acceleration with 10% probability of exceedance in 50 years, arcs
uspga250arc.shp--peak horizontal acceleration with 2% probability of exceedance in 50 years, arcs
us5hz050arc.shp--horizontal spectral response acceleration for 0.2-second period with 10% probability of exceedance in 50 years, arcs
us5hz250arc.shp--horizontal spectral response acceleration for 0.2-second period with 2% probability of exceedance in 50 years, arcs
us1hz050arc.shp--horizontal spectral response acceleration for 1.0-second period with 10% probability of exceedance in 50 years, arcs
us1hz250arc.shp--horizontal spectral response acceleration for 1.0-second period with 2% probability of exceedance in 50 years, arcs
uspga050pts.shp--peak horizontal acceleration with 10% probability of exceedance in 50 years, points
uspga250pts.shp--peak horizontal acceleration with 2% probability of exceedance in 50 years, points
us5hz050pts.shp--horizontal spectral response acceleration for 0.2-second period with 10% probability of exceedance in 50 years, points
us5hz250pts.shp--horizontal spectral response acceleration for 0.2-second period with 2% probability of exceedance in 50 years, points
us1hz050pts.shp--horizontal spectral response acceleration for 1.0-second period with 10% probability of exceedance in 50 years, points
us1hz250pts.shp--horizontal spectral response acceleration for 1.0-second period with 2% probability of exceedance in 50 years, points
HOW TO OBTAIN THE DIGITAL FILES
The digital files constituting the geologic map database of this report can be obtained via the Internet from the U.S.Geological Survey
publications website. Go to the web page at
http://pubs.usgs.gov/sim/3195/ and follow the directions to download the files.
The main product is a Portable Document Format (.pdf) map,
which requires Adobe Acrobat for viewing. Acrobat software
runs on a variety of systems, and is available for download
free of charge from Adobe at http://www.adobe.com.