Open-File Report 96-532
List of FiguresThe figures referenced in the document have been reduced in size to permit viewing on smaller screens.
The figures below are viewable and/or printable full size in GIF and PDF format.
Figure 4. M zones used in the CEUS (for models 1-4 only). Values are for moment magnitude. See text for description of magnitudes of large events used in model 5 for New Madrid and Charleston areas. GIF, 28 kb; PDF, 309 kb
Figure 5. a) Cumulative number of earthquakes versus time for the CEUS for magnitudes 3.0-3.5. Latitude and longitude ranges are shown to right. GIF, 6 kb; PDF, 80 kb b) Plot for area around New Madrid for same magnitude range. GIF, 5 kb; PDF, 18 kb
Figure 6. b-value plot for CEUS events (24.6-50 degrees N latitude; 65-105 degrees W longitude), excluding Charlevoix events. ML stands for fit from maximum likelihood method. LS denotes fit from least-squares method. b-values determined from each method are shown to right. GIF, 7 kb; PDF, 135 kb
Figure 7. Fictitious faults used to calculate hazard from large earthquakes in the New Madrid area (see text). Also shown are earthquakes from the Seeber and Armbruster (1992) catalog. GIF, 13 kb; PDF, 135 kb
Figure 15. Mean hazard curves for selected CEUS cities, for cases without background zones (solid lines) and for cases with background zones (dashed lines). Symbols are keyed to cities. Weighting schemes are given in captions to Figures 14 and 15. GIF, 24 kb; PDF, 458 kb
Figure 17. Scheme used to make hazard calculations for WUS. GIF, 9 kb
Figure 19. Seismic hazard map constructed from model 1, not including faults (see left side of Figure 17) and without background zones. This map shows the ground motion values in only a limited portion of the WUS. GIF, 49 kb; PDF, 549 kb
Figure 20. Seismic hazard map made from only the background zones (model 2; see Figure 18). Note the lower values in northeastern California caused by the lower M values (see Figure 27 and text). This map shows the ground motion values in only a limited portion of the WUS. GIF, 42 kb; PDF, 343 kb
Figure 21. Seismic hazard map made from model 1 (gridded seismicity; weight 0.67) and model 2 (background zones, weight 0.33), not including faults. This map shows the ground motion values in only a limited portion of the WUS. GIF, 49 kb; PDF, 488 kb
Figure 22. Mean hazard curves for selected WUS cities, keyed by symbols. Solid lines are for case without background zones (gridded seismicity plus faults). Dashed lines are for case with background zones, (weight 0.33) gridded seismicity (weight 0.67), and faults. GIF, 95 kb; PDF, 393 kb
Figure A1. Shallow shear-wave velocity profiles used for CEUS: 1) site with 760 m/sec average shear-wave velocity for top 30m (B-C boundary; solid line) and 2) hard-rock site (dashed line). GIF, 7 kb; PDF, 11 kb
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