Revision III Ratio Maps

The maps presented on this page represent ratio maps comparing different assumptions about soil conditions. All maps presented here use the Revision III Maps as the basis for comparison.

Region Spectral Acceleration Probability of Exceedance VS30 Download
Western U.S. Peak Ground Acceleration 2% in 50 Years 1,150 m/s over 760 m/s PDF (571 kB)
PNG (229 kB)
Western U.S. Peak Ground Acceleration 2% in 50 Years 180 m/s over 259 m/s PDF (390 kB)
PNG (158 kB)
Western U.S. Peak Ground Acceleration 2% in 50 Years 259 m/s over 360 m/s PDF (84 kB)
PNG (184 kB)
Western U.S. Peak Ground Acceleration 2% in 50 Years 259 m/s over 760 m/s PDF (88 kB)
PNG (265 kB)
Western U.S. Peak Ground Acceleration 2% in 50 Years 537 m/s over 360 m/s PDF (71 kB)
PNG (129 kB)
Western U.S. Peak Ground Acceleration 2% in 50 Years 537 m/s over 760 m/s PDF (83 kB)
PNG (136 kB)
Western U.S. 0.1 Second Sa (10.0 Hz) 2% in 50 Years 1,150 m/s over 760 m/s PDF (72 kB)
PNG (132 kB)
Western U.S. 0.1 Second Sa (10.0 Hz) 2% in 50 Years 180 m/s over 259 m/s PDF (88 kB)
PNG (172 kB)
Western U.S. 0.1 Second Sa (10.0 Hz) 2% in 50 Years 259 m/s over 360 m/s PDF (88 kB)
PNG (163 kB)
Western U.S. 0.2 Second Sa (5.0 Hz) 2% in 50 Years 1,150 m/s over 760 m/s PDF (661 kB)
PNG (277 kB)
Western U.S. 0.2 Second Sa (5.0 Hz) 2% in 50 Years 180 m/s over 259 m/s PDF (89 kB)
PNG (167 kB)
Western U.S. 0.2 Second Sa (5.0 Hz) 2% in 50 Years 259 m/s over 360 m/s PDF (87 kB)
PNG (175 kB)
Western U.S. 0.2 Second Sa (5.0 Hz) 2% in 50 Years 259 m/s over 760 m/s PDF (91 kB)
PNG (273 kB)
Western U.S. 0.2 Second Sa (5.0 Hz) 2% in 50 Years 537 m/s over 760 m/s PDF (84 kB)
PNG (209 kB)
Western U.S. 0.3 Second Sa (3.33 Hz) 2% in 50 Years 1,150 m/s over 760 m/s PDF (674 kB)
PNG (255 kB)
Western U.S. 0.3 Second Sa (3.33 Hz) 2% in 50 Years 180 m/s over 259 m/s PDF (391 kB)
PNG (162 kB)
Western U.S. 0.5 Second Sa (2 Hz) 2% in 50 Years 180 m/s over 259 m/s PDF (90 kB)
PNG (159 kB)
Western U.S. 0.5 Second Sa (2 Hz) 2% in 50 Years 259 m/s over 360 m/s PDF (80 kB)
PNG (220 kB)
Western U.S. 0.5 Second Sa (2 Hz) 2% in 50 Years 537 m/s over 360 m/s PDF (74 kB)
PNG (189 kB)
Western U.S. 0.75 Second Sa (1.33 Hz) 2% in 50 Years 1,150 m/s over 760 m/s PDF (72 kB)
PNG (132 kB)
Western U.S. 0.75 Second Sa (1.33 Hz) 2% in 50 Years 180 m/s over 259 m/s PDF (85 kB)
PNG (150 kB)
Western U.S. 1.0 Second Sa (1.0 Hz) 2% in 50 Years 1,150 m/s over 760 m/s PDF (657 kB)
PNG (237 kB)
Western U.S. 1.0 Second Sa (1.0 Hz) 2% in 50 Years 180 m/s over 259 m/s PDF (130 kB)
PNG (204 kB)
Western U.S. 1.0 Second Sa (1.0 Hz) 2% in 50 Years 259 m/s over 360 m/s PDF (74 kB)
PNG (214 kB)
Western U.S. 1.0 Second Sa (1.0 Hz) 2% in 50 Years 259 m/s over 760 m/s PDF (83 kB)
PNG (193 kB)
Western U.S. 1.0 Second Sa (1.0 Hz) 2% in 50 Years 537 m/s over 360 m/s PDF (76 kB)
PNG (165 kB)
Western U.S. 1.0 Second Sa (1.0 Hz) 2% in 50 Years 537 m/s over 760 m/s PDF (79 kB)
PNG (151 kB)
Western U.S. 2.0 Second Sa (0.5 Hz) 2% in 50 Years 1,150 m/s over 760 m/s PDF (726 kB)
PNG (285 kB)
Western U.S. 2.0 Second Sa (0.5 Hz) 2% in 50 Years 180 m/s over 259 m/s PDF (80 kB)
PNG (182 kB)
Western U.S. 2.0 Second Sa (0.5 Hz) 2% in 50 Years 537 m/s over 360 m/s PDF (68 kB)
PNG (182 kB)
Western U.S. 2.0 Second Sa (0.5 Hz) 2% in 50 Years 537 m/s over 760 m/s PDF (72 kB)
PNG (196 kB)
Western U.S. 3.0 Second Sa (0.33 Hz) 2% in 50 Years 259 m/s over 760 m/s PDF (74 kB)
PNG (215 kB)
Western U.S. 4.0 Second Sa (0.25 Hz) 2% in 50 Years 1,150 m/s over 760 m/s PDF (74 kB)
PNG (135 kB)
Western U.S. 4.0 Second Sa (0.25 Hz) 2% in 50 Years 537 m/s over 360 m/s PDF (78 kB)
PNG (172 kB)
Western U.S. 4.0 Second Sa (0.25 Hz) 2% in 50 Years 537 m/s over 760 m/s PDF (83 kB)
PNG (181 kB)