Revision III Maps
Since the maps were submitted to the Building Seismic Safety Council the following additional changes are recommended for future updates of the hazard maps. The December 2008 maps are referred to as Revision II. For Revision III ratio maps visit this page.
| Region | Spectral Acceleration | Probability of Exceedance | VS30 | Download |
|---|---|---|---|---|
| Central/Eastern U.S. | Peak Ground Acceleration | 7% in 75 Years | 2,000 m/s | PDF (124 kB) PNG (125 kB) |
| Central/Eastern U.S. | Peak Ground Acceleration | 2% in 50 Years | 2,000 m/s | PDF (134 kB) PNG (143 kB) |
| Central/Eastern U.S. | 0.1 Second Sa (10.0 Hz) | 2% in 50 Years | 2,000 m/s | PDF (136 kB) PNG (135 kB) |
| Central/Eastern U.S. | 0.2 Second Sa (5.0 Hz) | 2% in 50 Years | 2,000 m/s | PDF (135 kB) PNG (129 kB) |
| Central/Eastern U.S. | 0.3 Second Sa (3.33 Hz) | 2% in 50 Years | 2,000 m/s | PDF (133 kB) PNG (123 kB) |
| Central/Eastern U.S. | 0.5 Second Sa (2 Hz) | 2% in 50 Years | 2,000 m/s | PDF (131 kB) PNG (130 kB) |
| Central/Eastern U.S. | 1.0 Second Sa (1.0 Hz) | 2% in 50 Years | 2,000 m/s | PDF (130 kB) PNG (133 kB) |
| Central/Eastern U.S. | 2.0 Second Sa (0.5 Hz) | 2% in 50 Years | 2,000 m/s | PDF (129 kB) PNG (124 kB) |
| Western U.S. | Peak Ground Acceleration | 2% in 50 Years | 1,150 m/s | PDF (340 kB) PNG (147 kB) |
| Western U.S. | Peak Ground Acceleration | 2% in 50 Years | 180 m/s | PDF (140 kB) PNG (150 kB) |
| Western U.S. | Peak Ground Acceleration | 10% in 50 Years | 180 m/s | PDF (141 kB) PNG (190 kB) |
| Western U.S. | Peak Ground Acceleration | 2% in 50 Years | 259 m/s | PDF (143 kB) PNG (152 kB) |
| Western U.S. | Peak Ground Acceleration | 2% in 50 Years | 360 m/s | PDF (83 kB) PNG (143 kB) |
| Western U.S. | Peak Ground Acceleration | 2% in 50 Years | 537 m/s | PDF (139 kB) PNG (153 kB) |
| Western U.S. | 0.1 Second Sa (10.0 Hz) | 2% in 50 Years | 1,150 m/s | PDF (85 kB) PNG (145 kB) |
| Western U.S. | 0.1 Second Sa (10.0 Hz) | 2% in 50 Years | 180 m/s | PDF (84 kB) PNG (141 kB) |
| Western U.S. | 0.1 Second Sa (10.0 Hz) | 2% in 50 Years | 259 m/s | PDF (84 kB) PNG (142 kB) |
| Western U.S. | 0.1 Second Sa (10.0 Hz) | 2% in 50 Years | 360 m/s | PDF (84 kB) PNG (143 kB) |
| Western U.S. | 0.1 Second Sa (10.0 Hz) | 2% in 50 Years | 537 m/s | PDF (82 kB) PNG (141 kB) |
| Western U.S. | 0.2 Second Sa (5.0 Hz) | 2% in 50 Years | 1,150 m/s | PDF (369 kB) PNG (147 kB) |
| Western U.S. | 0.2 Second Sa (5.0 Hz) | 2% in 50 Years | 180 m/s | PDF (81 kB) PNG (141 kB) |
| Western U.S. | 0.2 Second Sa (5.0 Hz) | 2% in 50 Years | 259 m/s | PDF (72 kB) PNG (133 kB) |
| Western U.S. | 0.2 Second Sa (5.0 Hz) | 2% in 50 Years | 360 m/s | PDF (85 kB) PNG (144 kB) |
| Western U.S. | 0.2 Second Sa (5.0 Hz) | 2% in 50 Years | 537 m/s | PDF (146 kB) PNG (159 kB) |
| Western U.S. | 0.2 Second Sa (5.0 Hz) | 5% in 50 Years | 537 m/s | PDF (131 kB) PNG (149 kB) |
| Western U.S. | 0.3 Second Sa (3.33 Hz) | 2% in 50 Years | 1,150 m/s | PDF (367 kB) PNG (146 kB) |
| Western U.S. | 0.3 Second Sa (3.33 Hz) | 5% in 50 Years | 1,150 m/s | PDF (82 kB) PNG (140 kB) |
| Western U.S. | 0.3 Second Sa (3.33 Hz) | 2% in 50 Years | 180 m/s | PDF (78 kB) PNG (137 kB) |
| Western U.S. | 0.3 Second Sa (3.33 Hz) | 2% in 50 Years | 259 m/s | PDF (84 kB) PNG (143 kB) |
| Western U.S. | 0.3 Second Sa (3.33 Hz) | 2% in 50 Years | 360 m/s | PDF (85 kB) PNG (144 kB) |
| Western U.S. | 0.3 Second Sa (3.33 Hz) | 2% in 50 Years | 537 m/s | PDF (86 kB) PNG (142 kB) |
| Western U.S. | 0.5 Second Sa (2 Hz) | 2% in 50 Years | 1,150 m/s | PDF (83 kB) PNG (141 kB) |
| Western U.S. | 0.5 Second Sa (2 Hz) | 2% in 50 Years | 180 m/s | PDF (79 kB) PNG (138 kB) |
| Western U.S. | 0.5 Second Sa (2 Hz) | 2% in 50 Years | 259 m/s | PDF (80 kB) PNG (138 kB) |
| Western U.S. | 0.5 Second Sa (2 Hz) | 10% in 50 Years | 259 m/s | PDF (77 kB) PNG (134 kB) |
| Western U.S. | 0.5 Second Sa (2 Hz) | 2% in 50 Years | 360 m/s | PDF (85 kB) PNG (143 kB) |
| Western U.S. | 0.5 Second Sa (2 Hz) | 2% in 50 Years | 537 m/s | PDF (133 kB) PNG (150 kB) |
| Western U.S. | 0.75 Second Sa (1.33 Hz) | 2% in 50 Years | 1,150 m/s | PDF (84 kB) PNG (142 kB) |
| Western U.S. | 0.75 Second Sa (1.33 Hz) | 5% in 50 Years | 1,150 m/s | PDF (81 kB) PNG (137 kB) |
| Western U.S. | 0.75 Second Sa (1.33 Hz) | 2% in 50 Years | 180 m/s | PDF (79 kB) PNG (139 kB) |
| Western U.S. | 0.75 Second Sa (1.33 Hz) | 2% in 50 Years | 259 m/s | PDF (354 kB) PNG (136 kB) |
| Western U.S. | 0.75 Second Sa (1.33 Hz) | 2% in 50 Years | 360 m/s | PDF (84 kB) PNG (140 kB) |
| Western U.S. | 0.75 Second Sa (1.33 Hz) | 2% in 50 Years | 537 m/s | PDF (83 kB) PNG (135 kB) |
| Western U.S. | 0.75 Second Sa (1.33 Hz) | 10% in 50 Years | 537 m/s | PDF (80 kB) PNG (129 kB) |
| Western U.S. | 0.75 Second Sa (1.33 Hz) | 2% in 50 Years | 760 m/s | PDF (586 kB) PNG (152 kB) |
| Western U.S. | 0.75 Second Sa (1.33 Hz) | 5% in 50 Years | 760 m/s | PDF (557 kB) PNG (147 kB) |
| Western U.S. | 1.0 Second Sa (1.0 Hz) | 2% in 50 Years | 1,150 m/s | PDF (480 kB) PNG (154 kB) |
| Western U.S. | 1.0 Second Sa (1.0 Hz) | 2% in 50 Years | 180 m/s | PDF (86 kB) PNG (146 kB) |
| Western U.S. | 1.0 Second Sa (1.0 Hz) | 2% in 50 Years | 259 m/s | PDF (91 kB) PNG (149 kB) |
| Western U.S. | 1.0 Second Sa (1.0 Hz) | 2% in 50 Years | 360 m/s | PDF (83 kB) PNG (143 kB) |
| Western U.S. | 1.0 Second Sa (1.0 Hz) | 2% in 50 Years | 537 m/s | PDF (137 kB) PNG (151 kB) |
| Western U.S. | 2.0 Second Sa (0.5 Hz) | 2% in 50 Years | 1,150 m/s | PDF (358 kB) PNG (136 kB) |
| Western U.S. | 2.0 Second Sa (0.5 Hz) | 2% in 50 Years | 180 m/s | PDF (87 kB) PNG (147 kB) |
| Western U.S. | 2.0 Second Sa (0.5 Hz) | 2% in 50 Years | 259 m/s | PDF (88 kB) PNG (143 kB) |
| Western U.S. | 2.0 Second Sa (0.5 Hz) | 2% in 50 Years | 360 m/s | PDF (81 kB) PNG (139 kB) |
| Western U.S. | 2.0 Second Sa (0.5 Hz) | 2% in 50 Years | 537 m/s | PDF (81 kB) PNG (135 kB) |
| Western U.S. | 3.0 Second Sa (0.33 Hz) | 2% in 50 Years | 1,150 m/s | PDF (77 kB) PNG (131 kB) |
| Western U.S. | 3.0 Second Sa (0.33 Hz) | 2% in 50 Years | 180 m/s | PDF (84 kB) PNG (142 kB) |
| Western U.S. | 3.0 Second Sa (0.33 Hz) | 2% in 50 Years | 259 m/s | PDF (80 kB) PNG (136 kB) |
| Western U.S. | 3.0 Second Sa (0.33 Hz) | 2% in 50 Years | 360 m/s | PDF (81 kB) PNG (136 kB) |
| Western U.S. | 3.0 Second Sa (0.33 Hz) | 2% in 50 Years | 537 m/s | PDF (72 kB) PNG (122 kB) |
| Western U.S. | 3.0 Second Sa (0.33 Hz) | 5% in 50 Years | 760 m/s | PDF (394 kB) PNG (131 kB) |
| Western U.S. | 4.0 Second Sa (0.25 Hz) | 2% in 50 Years | 1,150 m/s | PDF (76 kB) PNG (127 kB) |
| Western U.S. | 4.0 Second Sa (0.25 Hz) | 2% in 50 Years | 180 m/s | PDF (80 kB) PNG (138 kB) |
| Western U.S. | 4.0 Second Sa (0.25 Hz) | 2% in 50 Years | 259 m/s | PDF (354 kB) PNG (135 kB) |
| Western U.S. | 4.0 Second Sa (0.25 Hz) | 2% in 50 Years | 360 m/s | PDF (82 kB) PNG (138 kB) |
| Western U.S. | 4.0 Second Sa (0.25 Hz) | 2% in 50 Years | 537 m/s | PDF (78 kB) PNG (132 kB) |
| Western U.S. | 4.0 Second Sa (0.25 Hz) | 2% in 50 Years | 760 m/s | PDF (638 kB) PNG (140 kB) |
| Western U.S. | 4.0 Second Sa (0.25 Hz) | 5% in 50 Years | 760 m/s | PDF (129 kB) PNG (140 kB) |
| Western U.S. | 5.0 Second Sa (0.2 Hz) | 2% in 50 Years | 1,150 m/s | PDF (75 kB) PNG (125 kB) |
| Western U.S. | 5.0 Second Sa (0.2 Hz) | 2% in 50 Years | 180 m/s | PDF (80 kB) PNG (136 kB) |
| Western U.S. | 5.0 Second Sa (0.2 Hz) | 2% in 50 Years | 259 m/s | PDF (82 kB) PNG (136 kB) |
| Western U.S. | 5.0 Second Sa (0.2 Hz) | 10% in 50 Years | 259 m/s | PDF (76 kB) PNG (123 kB) |
| Western U.S. | 5.0 Second Sa (0.2 Hz) | 2% in 50 Years | 360 m/s | PDF (81 kB) PNG (134 kB) |
| Western U.S. | 5.0 Second Sa (0.2 Hz) | 2% in 50 Years | 537 m/s | PDF (89 kB) PNG (146 kB) |
| Western U.S. | 5.0 Second Sa (0.2 Hz) | 2% in 50 Years | 760 m/s | PDF (342 kB) PNG (132 kB) |
| Western U.S. | 5.0 Second Sa (0.2 Hz) | 5% in 50 Years | 760 m/s | PDF (372 kB) PNG (128 kB) |
| Western U.S. | Peak Ground Velocity | 2% in 50 Years | 259 m/s | PDF (82 kB) PNG (136 kB) |
| Western U.S. | Peak Ground Velocity | 2% in 50 Years | 360 m/s | PDF (83 kB) PNG (140 kB) |
| Western U.S. | Peak Ground Velocity | 2% in 50 Years | 537 m/s | PDF (83 kB) PNG (135 kB) |
