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Earthquake Hazards Program


2008 July 29 18:42:15 UTC

Theoretical P-Wave Travel Times

Theoretical P-wave Travel Times
Theoretical P-wave Travel Times

These maps show the predicted (theoretical) travel times, in minutes, of the compressional (P) wave from the earthquake location to points around the globe. The travel times are computed using the spherically-symmetric IASP91 reference earth velocity model. The heavy black lines shown are the approximate distances to the P-wave shadow zone (103 to 140 degrees).

Theoretical P-Wave Travel Times
City Distance
Travel Time
Arrival Time
Los Angeles, California 0.41 0:08.218:42:23.2Pg
Phoenix, Arizona 4.77 1:11.518:43:26.5Pn
San Francisco, California 5.37 1:19.718:43:34.7Pn
Albuquerque, New Mexico 9.25 2:13.018:44:28.0Pn
Golden, Colorado 11.60 2:45.118:45:00.1Pn
Seattle, Washington 14.24 3:21.318:45:36.3Pn
Wichita, Kansas 16.99 3:57.218:46:12.2Pn
Brownsville, Texas 19.29 4:24.418:46:39.4P
Mexico City, Mexico 21.99 4:53.618:47:08.6P
St. Louis, Missouri 22.62 5:00.418:47:15.4P
Duluth, Minnesota 23.20 5:06.518:47:21.5P
Knoxville, Tennessee 26.73 5:39.018:47:54.0P
Washington, D.C. 32.94 6:34.018:48:49.0P
Miami, Florida 33.45 6:38.518:48:53.5P
Ottawa, Canada 33.96 6:42.918:48:57.9P
Anchorage, Alaska 34.19 6:44.918:48:59.9P
Philadephia, Pennsylvania 34.31 6:46.018:49:01.0P
New York, New York 35.15 6:53.218:49:08.2P
Boston, Massachusetts 37.26 7:11.218:49:26.2P
Honolulu, Hawaii 37.44 7:12.718:49:27.7P
Bangor, Maine 38.86 7:24.718:49:39.7P
San Juan, Puerto Rico 48.33 8:40.918:50:55.9P
Lima, Peru 59.9710:05.918:52:20.9P
Bergen, Norway 75.1011:41.618:53:56.6P
London, England 78.8612:02.818:54:17.8P
Tokyo, Japan 79.8512:08.118:54:23.1P
Moscow, Russia 88.2212:50.718:55:05.8P
Agana, Guam 88.6712:52.818:55:07.8P
Beijing, China 91.0713:04.118:55:19.1P
Rome, Italy 91.8013:07.418:55:22.4P
Wellington, New Zealand 97.1913:32.018:55:47.0P
Brisbane, Australia 104.2114:03.218:56:18.2Pdiff
Palmer Station, Antarctica 109.0814:24.818:56:39.8Pdiff
Kathmandu, Nepal 114.9014:50.618:57:05.6Pdiff
Nairobi, Kenya 139.7316:40.818:58:55.8Pdiff

Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver

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