OPEN-FILE REPORT 95-596

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

The text portion may be downloaded in Wordperfect 6.1 format from the Anonymous FTP area. See " GENERAL:Anonymous FTP".

The maps from Open-file Report 95-596 are listed below.
The following maps may be viewed, downloaded and printed in GIF and PDF formats. To view and print the PDF format you will need the Adobe Acrobat Reader software installed and configured for use with your World Wide Web browser. This may be obtained free from the Adobe Acrobat page.

The maps may be downloaded in postscript format from the Anonymous FTP area. See "GENERAL:Anonymous FTP".

APPENDIX A: USGS PEAK GROUND MOTION MAPS AND MAPS IN BUILDING CODE AND RELATED DOCUMENTS
APPENDIX B: 1994 SPECTRAL ORDINATE MAPS

APPENDIX C: 1991 SPECTRAL ORDINATE MAPS

APPENDIX E: BASIS OF MAPS

APPENDIX A: USGS PEAK GROUND MOTION MAPS AND MAPS IN BUILDING CODE AND RELATED DOCUMENTS

Figure A1. 1976 Contour map for peak horizontal acceleration (expressed as percent of gravity) in rock with 90 percent probability of not being exceeded in 50 years. The maximum acceleration within the 60 percent contour along the San Andreas and Garlock faults in California is 80 percent of gravity. After Algermissen and Perkins, 1976. GIF, 27kb; PDF, 531kb

Figure A2. Contour map for effective peak acceleration (EPA) coefficient, Aa, for the continental United States. The units of EPA are expressed as a percent of gravity. After BSSC, 1995 (This map was redrawn from the original source, if differences occur, the original source should be used). GIF, 26kb; PDF, 465kb

Figure A3. Contour map for effective peak velocity-related acceleration (EPV) coefficient, Av, for the continental United States. The units of EPV are expressed as a percent of gravity. After BSSC, 1995 (This map was redrawn from the original source, if differences occur, the original source should be used). GIF, 26kb; PDF, 489kb

Figure A4. One of the SEAOC Seismology Committee proposals for the 1988 Uniform Building Code zone map. Zones are identified by the numbers from 0 to 4. Seismic zone factors are assigned to each zone; Zone 0 = 0, Zone 1 = 0.1, Zone 2 = 0.20 (= 0.15 for Zone 2 east of the continental divide), Zone 3 = 0.3, and Zone 4 = 0.4. Each zone also has specific structural detailing requirements. After ICBO, 1986 (This map was redrawn from the original source, if differences occur, the original source should be used). GIF, 27kb; PDF, 418kb

Figure A5. 1988 Uniform Building Code zone map. Zones are identified by the numbers from 0 to 4. Seismic zone factors are assigned to each zone; Zone 0 = 0, Zone 1 = 0.075, Zone 2A = 0.15, Zone 2B = 0.20, Zone 3 = 0.3, and Zone 4 = 0.4. Each zone also has specific structural detailing requirements. After ICBO, 1988 (This map was redrawn from the original source, if differences occur, the original source should be used). GIF, 26kb; PDF, 440kb

Figure A6. 1990 Contour map for peak horizontal acceleration (expressed as percent of gravity) in rock with 90 percent probability of not being exceeded in 50 years. After Algermissen et al, 1990. GIF, 29kb; PDF, 842kb

Figure A7. 1994 Uniform Building Code zone map. Zones are identified by the numbers from 0 to 4. Seismic zone factors are assigned to each zone; Zone 0 = 0, Zone 1 = 0.075, Zone 2A = 0.15, Zone 2B = 0.20, Zone 3 = 0.3, and Zone 4 = 0.4. Each zone also has specific structural detailing requirements. After ICBO, 1994 (This map was redrawn from the original source, if differences occur, the original source should be used). GIF, 26kb; PDF, 435kb

Figure A8. ASCE A7 contour map for effective peak acceleration (EPA) coefficient Aa, for the continental United States. The units of EPA are expressed as a percent of gravity. After ASCE, 1994 (This map was redrawn from the original source, if differences occur, the original source should be used). GIF, 26kb; PDF, 470kb

Figure A9. ASCE A7 contour map for effective peak velocity-related acceleration (EPV) coefficient, Av, for the continental United States. The units of EPV are expressed as a percent of gravity. After ASCE, 1994 (This map has been redrawn from the original source, if differences occur, the original source should be used). GIF, 26kb; PDF, 464kb

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APPENDIX B: 1994 SPECTRAL ORDINATE MAPS

Figure B1. 1994 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 B2. 1994 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 B3. 1994 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 B4. 1994 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, 2.1Mb

Figure B5. 1994 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, 118kb

Figure B6. 1994 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, 31kb; PDF, 128kb

Figure B7. 1994 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, 159kb

Figure B8. 1994 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, 31kb; PDF, 155kb

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APPENDIX C: 1991 SPECTRAL ORDINATE MAPS

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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APPENDIX E: BASIS OF MAPS

Figure E1. Location of the attenuation boundary between east and west. The Boore-Joyner attenuation (1982) is used for all sources west of the boundary except for the Pacific northwest. In the Pacific northwest, the Youngs and Coppersmith (1989) attenuation is used for the Cascadia subduction zone and intraplate earthquakes. However, the Joyner-Boore (1982) attenuation is used for shallow earthquakes in the Pacific northwest. GIF, 15kb; PDF, 138kb

The following maps are available in GIF format only!

Figure E2. Pacific Northwest and Rocky Mountain region source zones with those areas that were also modeled using line sources, shown as shaded areas. From Hanson and Perkins (1995). GIF, 29kb

Figure E3. California source zones, with those shaded areas in which line sources were used to model finite ruptures for larger magnitude earthquakes. From Hanson and Perkins (1995). GIF, 24kb

Figure E4. Central and Eastern U.S. source zones, with those areas that were also modeled using line sources shown as shaded areas. From Hanson and Perkins (1995). GIF, 18kb