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Earthquake Hazards Program

Theoretical P-Wave Travel Times

Magnitude 3.8 WYOMING
Sunday, August 29, 2004 at 18:49:44 UTC

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

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
Golden, Colorado 3.12 0:49.918:50:33.9Pn
Albuquerque, New Mexico 7.83 1:54.518:51:38.5Pn
Wichita, Kansas 8.05 1:57.518:51:41.5Pn
Duluth, Minnesota 10.23 2:27.518:52:11.5Pn
St. Louis, Missouri 12.29 2:55.718:52:39.7Pn
Seattle, Washington 12.82 3:02.918:52:46.9Pn
Los Angeles, California 13.31 3:09.518:52:53.5Pn
San Francisco, California 13.88 3:17.318:53:01.3Pn
Knoxville, Tennessee 17.14 4:00.218:53:44.2Pn
Brownsville, Texas 18.15 4:12.818:53:56.8Pn
Ottawa, Canada 21.46 4:49.218:54:33.2P
Washington, D.C. 21.83 4:53.218:54:37.2P
Philadephia, Pennsylvania 22.87 5:04.318:54:48.3P
New York, New York 23.51 5:11.018:54:55.0P
Mexico City, Mexico 23.98 5:15.418:54:59.4P
Boston, Massachusetts 25.23 5:26.818:55:10.8P
Bangor, Maine 26.42 5:37.618:55:21.6P
Miami, Florida 26.83 5:41.218:55:25.2P
Anchorage, Alaska 32.08 6:27.818:56:11.8P
San Juan, Puerto Rico 41.14 7:45.018:57:29.0P
Honolulu, Hawaii 48.41 8:42.918:58:26.9P
Lima, Peru 60.5810:11.518:59:55.5P
Bergen, Norway 62.7110:25.919:00:09.9P
London, England 65.9510:47.119:00:31.1P
Moscow, Russia 76.9311:53.419:01:37.4P
Rome, Italy 78.8712:04.219:01:48.2P
Tokyo, Japan 81.8012:20.019:02:04.0P
Beijing, China 89.2912:57.219:02:41.2P
Agana, Guam 94.8813:23.019:03:07.0P
Kathmandu, Nepal 109.0914:26.319:04:10.3Pdiff
Wellington, New Zealand 110.2814:31.619:04:15.6Pdiff
Palmer Station, Antarctica 114.6514:51.019:04:35.0Pdiff
Brisbane, Australia 116.2114:57.919:04:41.9Pdiff
Nairobi, Kenya 126.6415:44.219:05:28.2Pdiff

Travel Time Information and Calculator


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