See Data File Formats at bottom of page.

Region Spectral Acceleration Probability of Exceedance VS30 Download
Central/Eastern U.S. Peak Ground Acceleration 2% in 50 Years 2,000 m/s Text (682 kB)
Central/Eastern U.S. Peak Ground Acceleration 10% in 50 Years 2,000 m/s Text (646 kB)
Central/Eastern U.S. Peak Ground Acceleration 5% in 50 Years 2,000 m/s Text (711 kB)
Central/Eastern U.S. 0.1 Second Sa (10.0 Hz) 2% in 50 Years 2,000 m/s Text (712 kB)
Central/Eastern U.S. 0.1 Second Sa (10.0 Hz) 10% in 50 Years 2,000 m/s Text (747 kB)
Central/Eastern U.S. 0.1 Second Sa (10.0 Hz) 5% in 50 Years 2,000 m/s Text (772 kB)
Central/Eastern U.S. 0.2 Second Sa (5.0 Hz) 2% in 50 Years 2,000 m/s Text (700 kB)
Central/Eastern U.S. 0.2 Second Sa (5.0 Hz) 10% in 50 Years 2,000 m/s Text (715 kB)
Central/Eastern U.S. 0.2 Second Sa (5.0 Hz) 5% in 50 Years 2,000 m/s Text (752 kB)
Central/Eastern U.S. 0.3 Second Sa (3.33 Hz) 2% in 50 Years 2,000 m/s Text (710 kB)
Central/Eastern U.S. 0.3 Second Sa (3.33 Hz) 10% in 50 Years 2,000 m/s Text (749 kB)
Central/Eastern U.S. 0.3 Second Sa (3.33 Hz) 5% in 50 Years 2,000 m/s Text (771 kB)
Central/Eastern U.S. 0.5 Second Sa (2 Hz) 2% in 50 Years 2,000 m/s Text (706 kB)
Central/Eastern U.S. 0.5 Second Sa (2 Hz) 10% in 50 Years 2,000 m/s Text (742 kB)
Central/Eastern U.S. 0.5 Second Sa (2 Hz) 5% in 50 Years 2,000 m/s Text (765 kB)
Central/Eastern U.S. 1.0 Second Sa (1.0 Hz) 2% in 50 Years 2,000 m/s Text (694 kB)
Central/Eastern U.S. 1.0 Second Sa (1.0 Hz) 10% in 50 Years 2,000 m/s Text (725 kB)
Central/Eastern U.S. 1.0 Second Sa (1.0 Hz) 5% in 50 Years 2,000 m/s Text (754 kB)
Central/Eastern U.S. 2.0 Second Sa (0.5 Hz) 2% in 50 Years 2,000 m/s Text (682 kB)
Central/Eastern U.S. 2.0 Second Sa (0.5 Hz) 10% in 50 Years 2,000 m/s Text (677 kB)
Central/Eastern U.S. 2.0 Second Sa (0.5 Hz) 5% in 50 Years 2,000 m/s Text (732 kB)
Conterminous U.S. Peak Ground Acceleration 2% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. Peak Ground Acceleration 10% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. Peak Ground Acceleration 5% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 0.1 Second Sa (10.0 Hz) 2% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 0.1 Second Sa (10.0 Hz) 10% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 0.1 Second Sa (10.0 Hz) 5% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 0.2 Second Sa (5.0 Hz) 2% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 0.2 Second Sa (5.0 Hz) 10% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 0.2 Second Sa (5.0 Hz) 5% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 0.3 Second Sa (3.33 Hz) 2% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 0.3 Second Sa (3.33 Hz) 10% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 0.3 Second Sa (3.33 Hz) 5% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 0.5 Second Sa (2 Hz) 2% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 0.5 Second Sa (2 Hz) 10% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 0.5 Second Sa (2 Hz) 5% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 1.0 Second Sa (1.0 Hz) 2% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 1.0 Second Sa (1.0 Hz) 10% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 1.0 Second Sa (1.0 Hz) 5% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 2.0 Second Sa (0.5 Hz) 2% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 2.0 Second Sa (0.5 Hz) 10% in 50 Years 760 m/s Text (3 Mb)
Conterminous U.S. 2.0 Second Sa (0.5 Hz) 5% in 50 Years 760 m/s Text (3 Mb)
Western U.S. Peak Ground Acceleration 2% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. Peak Ground Acceleration 10% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. Peak Ground Acceleration 5% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. Peak Ground Acceleration 2% in 50 Years 180 m/s Text (1 Mb)
Western U.S. Peak Ground Acceleration 10% in 50 Years 180 m/s Text (1 Mb)
Western U.S. Peak Ground Acceleration 5% in 50 Years 180 m/s Text (1 Mb)
Western U.S. Peak Ground Acceleration 2% in 50 Years 259 m/s Text (1 Mb)
Western U.S. Peak Ground Acceleration 10% in 50 Years 259 m/s Text (1 Mb)
Western U.S. Peak Ground Acceleration 5% in 50 Years 259 m/s Text (1 Mb)
Western U.S. Peak Ground Acceleration 2% in 50 Years 360 m/s Text (1 Mb)
Western U.S. Peak Ground Acceleration 10% in 50 Years 360 m/s Text (1 Mb)
Western U.S. Peak Ground Acceleration 5% in 50 Years 360 m/s Text (1 Mb)
Western U.S. Peak Ground Acceleration 2% in 50 Years 537 m/s Text (1 Mb)
Western U.S. Peak Ground Acceleration 10% in 50 Years 537 m/s Text (1 Mb)
Western U.S. Peak Ground Acceleration 5% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 0.1 Second Sa (10.0 Hz) 2% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 0.1 Second Sa (10.0 Hz) 10% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 0.1 Second Sa (10.0 Hz) 5% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 0.1 Second Sa (10.0 Hz) 2% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 0.1 Second Sa (10.0 Hz) 10% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 0.1 Second Sa (10.0 Hz) 5% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 0.1 Second Sa (10.0 Hz) 2% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 0.1 Second Sa (10.0 Hz) 10% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 0.1 Second Sa (10.0 Hz) 5% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 0.1 Second Sa (10.0 Hz) 2% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 0.1 Second Sa (10.0 Hz) 10% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 0.1 Second Sa (10.0 Hz) 5% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 0.1 Second Sa (10.0 Hz) 2% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 0.1 Second Sa (10.0 Hz) 10% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 0.1 Second Sa (10.0 Hz) 5% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 0.2 Second Sa (5.0 Hz) 2% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 0.2 Second Sa (5.0 Hz) 10% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 0.2 Second Sa (5.0 Hz) 5% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 0.2 Second Sa (5.0 Hz) 2% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 0.2 Second Sa (5.0 Hz) 10% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 0.2 Second Sa (5.0 Hz) 5% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 0.2 Second Sa (5.0 Hz) 2% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 0.2 Second Sa (5.0 Hz) 10% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 0.2 Second Sa (5.0 Hz) 5% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 0.2 Second Sa (5.0 Hz) 2% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 0.2 Second Sa (5.0 Hz) 10% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 0.2 Second Sa (5.0 Hz) 5% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 0.2 Second Sa (5.0 Hz) 2% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 0.2 Second Sa (5.0 Hz) 10% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 0.2 Second Sa (5.0 Hz) 5% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 0.3 Second Sa (3.33 Hz) 2% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 0.3 Second Sa (3.33 Hz) 10% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 0.3 Second Sa (3.33 Hz) 5% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 0.3 Second Sa (3.33 Hz) 2% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 0.3 Second Sa (3.33 Hz) 10% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 0.3 Second Sa (3.33 Hz) 5% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 0.3 Second Sa (3.33 Hz) 2% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 0.3 Second Sa (3.33 Hz) 10% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 0.3 Second Sa (3.33 Hz) 5% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 0.3 Second Sa (3.33 Hz) 2% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 0.3 Second Sa (3.33 Hz) 10% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 0.3 Second Sa (3.33 Hz) 5% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 0.3 Second Sa (3.33 Hz) 2% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 0.3 Second Sa (3.33 Hz) 10% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 0.3 Second Sa (3.33 Hz) 5% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 0.5 Second Sa (2 Hz) 2% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 0.5 Second Sa (2 Hz) 10% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 0.5 Second Sa (2 Hz) 5% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 0.5 Second Sa (2 Hz) 2% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 0.5 Second Sa (2 Hz) 10% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 0.5 Second Sa (2 Hz) 5% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 0.5 Second Sa (2 Hz) 2% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 0.5 Second Sa (2 Hz) 10% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 0.5 Second Sa (2 Hz) 5% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 0.5 Second Sa (2 Hz) 2% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 0.5 Second Sa (2 Hz) 10% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 0.5 Second Sa (2 Hz) 5% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 0.5 Second Sa (2 Hz) 2% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 0.5 Second Sa (2 Hz) 10% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 0.5 Second Sa (2 Hz) 5% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 0.75 Second Sa (1.33 Hz) 2% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 0.75 Second Sa (1.33 Hz) 10% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 0.75 Second Sa (1.33 Hz) 5% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 0.75 Second Sa (1.33 Hz) 2% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 0.75 Second Sa (1.33 Hz) 10% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 0.75 Second Sa (1.33 Hz) 5% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 0.75 Second Sa (1.33 Hz) 2% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 0.75 Second Sa (1.33 Hz) 10% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 0.75 Second Sa (1.33 Hz) 5% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 0.75 Second Sa (1.33 Hz) 2% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 0.75 Second Sa (1.33 Hz) 10% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 0.75 Second Sa (1.33 Hz) 5% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 0.75 Second Sa (1.33 Hz) 2% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 0.75 Second Sa (1.33 Hz) 10% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 0.75 Second Sa (1.33 Hz) 5% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 0.75 Second Sa (1.33 Hz) 2% in 50 Years 760 m/s Text (1015 kB)
Western U.S. 0.75 Second Sa (1.33 Hz) 10% in 50 Years 760 m/s Text (1010 kB)
Western U.S. 0.75 Second Sa (1.33 Hz) 5% in 50 Years 760 m/s Text (1020 kB)
Western U.S. 1.0 Second Sa (1.0 Hz) 2% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 1.0 Second Sa (1.0 Hz) 10% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 1.0 Second Sa (1.0 Hz) 5% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 1.0 Second Sa (1.0 Hz) 2% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 1.0 Second Sa (1.0 Hz) 10% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 1.0 Second Sa (1.0 Hz) 5% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 1.0 Second Sa (1.0 Hz) 2% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 1.0 Second Sa (1.0 Hz) 10% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 1.0 Second Sa (1.0 Hz) 5% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 1.0 Second Sa (1.0 Hz) 2% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 1.0 Second Sa (1.0 Hz) 10% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 1.0 Second Sa (1.0 Hz) 5% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 1.0 Second Sa (1.0 Hz) 2% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 1.0 Second Sa (1.0 Hz) 10% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 1.0 Second Sa (1.0 Hz) 5% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 2.0 Second Sa (0.5 Hz) 2% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 2.0 Second Sa (0.5 Hz) 10% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 2.0 Second Sa (0.5 Hz) 5% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 2.0 Second Sa (0.5 Hz) 2% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 2.0 Second Sa (0.5 Hz) 10% in 50 Years 180 m/s Text (990 kB)
Western U.S. 2.0 Second Sa (0.5 Hz) 5% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 2.0 Second Sa (0.5 Hz) 2% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 2.0 Second Sa (0.5 Hz) 10% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 2.0 Second Sa (0.5 Hz) 5% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 2.0 Second Sa (0.5 Hz) 2% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 2.0 Second Sa (0.5 Hz) 10% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 2.0 Second Sa (0.5 Hz) 5% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 2.0 Second Sa (0.5 Hz) 2% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 2.0 Second Sa (0.5 Hz) 10% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 2.0 Second Sa (0.5 Hz) 5% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 3.0 Second Sa (0.33 Hz) 2% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 3.0 Second Sa (0.33 Hz) 10% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 3.0 Second Sa (0.33 Hz) 5% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 3.0 Second Sa (0.33 Hz) 2% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 3.0 Second Sa (0.33 Hz) 10% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 3.0 Second Sa (0.33 Hz) 5% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 3.0 Second Sa (0.33 Hz) 2% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 3.0 Second Sa (0.33 Hz) 10% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 3.0 Second Sa (0.33 Hz) 5% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 3.0 Second Sa (0.33 Hz) 2% in 50 Years 360 m/s Text (1004 kB)
Western U.S. 3.0 Second Sa (0.33 Hz) 10% in 50 Years 360 m/s Text (957 kB)
Western U.S. 3.0 Second Sa (0.33 Hz) 5% in 50 Years 360 m/s Text (985 kB)
Western U.S. 3.0 Second Sa (0.33 Hz) 2% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 3.0 Second Sa (0.33 Hz) 10% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 3.0 Second Sa (0.33 Hz) 5% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 3.0 Second Sa (0.33 Hz) 2% in 50 Years 760 m/s Text (1 Mb)
Western U.S. 3.0 Second Sa (0.33 Hz) 10% in 50 Years 760 m/s Text (1 Mb)
Western U.S. 3.0 Second Sa (0.33 Hz) 5% in 50 Years 760 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 2% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 10% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 5% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 2% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 10% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 5% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 2% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 10% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 5% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 2% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 10% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 5% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 2% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 10% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 5% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 2% in 50 Years 760 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 10% in 50 Years 760 m/s Text (1 Mb)
Western U.S. 4.0 Second Sa (0.25 Hz) 5% in 50 Years 760 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 2% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 10% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 5% in 50 Years 1,150 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 2% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 10% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 5% in 50 Years 180 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 2% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 10% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 5% in 50 Years 259 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 2% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 10% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 5% in 50 Years 360 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 2% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 10% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 5% in 50 Years 537 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 2% in 50 Years 760 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 10% in 50 Years 760 m/s Text (1 Mb)
Western U.S. 5.0 Second Sa (0.2 Hz) 5% in 50 Years 760 m/s Text (1 Mb)
Western U.S. Peak Ground Velocity 2% in 50 Years 259 m/s Text (1 Mb)
Western U.S. Peak Ground Velocity 10% in 50 Years 259 m/s Text (1 Mb)
Western U.S. Peak Ground Velocity 2% in 50 Years 360 m/s Text (1 Mb)
Western U.S. Peak Ground Velocity 2% in 50 Years 537 m/s Text (1 Mb)
Western U.S. Peak Ground Velocity 10% in 50 Years 537 m/s Text (1 Mb)

Data File Formats

“Hazard Curves” Files

Snapshot of 1Hz Curve File

These files contain hazard curves for the gridded geographic points as described above. All the hazard curves in the file share the same set of x-values (intensity measure levels). The first two lines tell you that these files contain data for both the western and central and eastern United States. The third line specifies the spectral period (in seconds) used when computing the hazard curves for the file. The following lines (with 1 value per line) contain the x-values (intensity measure levels) for all the curves in the file. Subsequent lines contain hazard curves with a single geographic point per line. The first two values specify the latitude and longitude (respectively) for the curve while subsequent values (on that same line) contain mean annual frequencies of exceedance ordered corresponding to the x-values at the top of the file.

“X% in 50 Years” Files

Snapshot of 10pc50 Ground Motions

These files contain ground motion values for the gridded geographic points as described above. The ground motion units are in g where 1g = 980.5 cm/s/s. Data contained in these files specify a single geographic point per line starting with longitude and latitude values (respectively), with the third and final value of each line specifying the ground motion for that geographic point.