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Scientific Investigations Map 3325

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Seismic-Hazard Maps for the Conterminous United States, 2014

By Mark D. Petersen, Morgan P. Moschetti, Peter M. Powers, Charles S. Mueller, Kathleen M. Haller, Arthur D. Frankel, Yuehua Zeng, Sanaz Rezaeian, Stephen C. Harmsen, Oliver S. Boyd, Edward H. Field, Rui Chen, Nicolas Luco, Russell L. Wheeler, Robert A. Williams, Anna H. Olsen, and Kenneth S. Rukstales

Thumbnail of and link to report PDF (10.2 MB)Abstract

The maps presented here provide an update to the 2008 data contained in U.S Geological Survey Scientific Investigations Map 3195 (https://pubs.usgs.gov/sim/3195/).Probabilistic seismic-hazard maps were prepared for the conterminous United States for 2014 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 historical 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 was 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 sources.

First posted April 13, 2015

For additional information contact:
Director, Geologic Hazards Science Center
U.S. Geological Survey
Box 25046, MS–966
Denver, CO 80225-0046
http://geohazards.cr.usgs.gov/

For additional information contact:
National Earthquake Hazards Reduction Program (NEHRP)
http://www.nehrp.gov/

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Suggested citation:

Petersen, M.D., Moschetti, M.P., Powers, P.M., Mueller, C.S., Haller, K.M., Frankel, A.D., Zeng, Yuehua, Rezaeian, Sanaz, Harmsen, S.C., Boyd, O.S., Field, E.H., Chen, Rui, Luco, Nicolas, Wheeler, R.L., Williams, R.A., Olsen, A.H., and Rukstales, K.S., 2015, Seismic-hazard maps for the conterminous United States, 2014: U.S. Geological Survey Scientific Investigations Map 3325, 6 sheets, scale 1: 7,000,000, https://dx.doi.org/10.3133/sim3325.

ISSN 2329-132X (online)


Contents

Sheets

SIM3325_sheet1.pdf--map of peak horizontal acceleration with 10% probability of exceedance in 50 years

SIM3325_sheet2.pdf--map of peak horizontal acceleration with 2% probability of exceedance in 50 years

SIM3325_sheet3.pdf--map of horizontal spectral response acceleration for 0.2-second period (5 Percent of Critical Damping) with 10% probability of exceedance in 50 years

SIM3325_sheet4.pdf--map of horizontal spectral response acceleration for 0.2-second period (5 Percent of Critical Damping) with 2% probability of exceedance in 50 years

SIM3325_sheet5.pdf--map of horizontal spectral response acceleration for 1.0-second period (5 Percent of Critical Damping) with 10% probability of exceedance in 50 years

SIM3325_sheet6.pdf--map of horizontal spectral response acceleration for 1.0-second period (5 Percent of Critical Damping) with 2% probability of exceedance in 50 years

GIS data

SIM3325-1.zip

SIM3325-2.zip

SIM3325-3.zip

SIM3325-4.zip

SIM3325-5.zip

SIM3325-6.zip

Metadata


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