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OFR 95–596: Appendix C

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USGS Spectral Response Maps and their Relationship with Seismic Design Forces in Building Codes

By E. V. Leyendecker, D. M. Perkins, S. T. Algermissen, P. C. Thenhaus, and S. L. Hanson

APPENDIX C: 1991 SPECTRAL ORDINATE MAPS

The following maps may be viewed, downloaded and printed in GIF and PDF formats.

Figure C1. 1991 contour map of the 5 percent damped, 0.3 second pseudo-acceleration spectral response, expressed in percent of the acceleration of gravity, with a 10-percent probability of exceedance in 50 years. The map values include estimates of variability in the attenuation of spectral acceleration and in fault rupture length. GIF, 73kb; PDF, 2.1Mb

Figure C2. 1991 contour map of the 5 percent damped, 1.0 second pseudo-acceleration spectral response, expressed in percent of the acceleration of gravity, with a 10-percent probability of exceedance in 50 years. The map values include estimates of variability in the attenuation of spectral acceleration and in fault rupture length. GIF, 69kb; PDF, 2.0Mb

Figure C3. 1991 contour map of the 5 percent damped, 0.3 second pseudo-acceleration spectral response, expressed in percent of the acceleration of gravity, with a 10-percent probability of exceedance in 250 years. The map values include estimates of variability in the attenuation of spectral acceleration and in fault rupture length. GIF, 75kb; PDF, 2.4Mb

Figure C4. 1991 contour map of the 5 percent damped, 1.0 second pseudo-acceleration spectral response, expressed in percent of the acceleration of gravity, with a 10-percent probability of exceedance in 250 years. The map values include estimates of variability in the attenuation of spectral acceleration and in fault rupture length. GIF, 72kb; PDF, 2.2Mb

Figure C5. 1991 contour map of the 5 percent damped, 0.3 second pseudo-acceleration spectral response, expressed in percent of the acceleration of gravity, with a 10-percent probability of exceedance in 50 years. The map values include estimates of variability in the attenuation of spectral acceleration and in fault rupture length. GIF, 30kb; PDF, 122kb

Figure C6. 1991 USGS map of the 5 percent damped, 1.0 second pseudo-acceleration spectral response, expressed in percent of the acceleration of gravity, with a 10-percent probability of exceedance in 50 years. The map values include estimates of variability in the attenuation of spectral acceleration and in fault rupture length. GIF, 31kb; PDF, 135kb

Figure C7. 1991 contour map of the 5 percent damped, 0.3 second pseudo-acceleration spectral response, expressed in percent of the acceleration of gravity, with a 10-percent probability of exceedance in 250 years. The map values include estimates of variability in the attenuation of spectral acceleration and in fault rupture length. GIF, 31kb; PDF, 156kb

Figure C8. 1991 contour map of the 5 percent damped, 1.0 second pseudo-acceleration spectral response, expressed in percent of the acceleration of gravity, with a 10-percent probability of exceedance in 250 years. The map values include estimates of variability in the attenuation of spectral acceleration and in fault rupture length. GIF, 32kb; PDF, 154kb

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