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Earthquake Hazards Program

Theoretical P-Wave Travel Times

Monday, July 12, 2004 at 16:45:00 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
Seattle, Washington 3.79 0:56.416:45:56.4Pn
San Francisco, California 6.73 1:36.916:46:36.9Pn
Los Angeles, California 11.35 2:40.116:47:40.1Pn
Golden, Colorado 15.04 3:30.516:48:30.5Pn
Albuquerque, New Mexico 16.53 3:49.716:48:49.7Pn
Wichita, Kansas 21.45 4:45.916:49:45.9P
Anchorage, Alaska 22.61 4:58.316:49:58.3P
Duluth, Minnesota 22.69 4:59.116:49:59.1P
St. Louis, Missouri 26.14 5:31.516:50:31.5P
Brownsville, Texas 28.53 5:53.016:50:53.0P
Knoxville, Tennessee 30.97 6:14.616:51:14.6P
Mexico City, Mexico 32.61 6:28.916:51:28.9P
Ottawa, Canada 34.16 6:42.516:51:42.5P
Washington, D.C. 35.50 6:54.016:51:54.0P
Honolulu, Hawaii 35.84 6:56.916:51:56.9P
Philadephia, Pennsylvania 36.40 7:01.716:52:01.7P
New York, New York 36.91 7:06.116:52:06.1P
Boston, Massachusetts 38.33 7:18.116:52:18.1P
Bangor, Maine 39.04 7:24.016:52:24.0P
Miami, Florida 40.17 7:33.416:52:33.4P
San Juan, Puerto Rico 54.78 9:26.916:54:26.9P
Bergen, Norway 67.9110:55.916:55:55.9P
Tokyo, Japan 69.7911:07.616:56:07.6P
Lima, Peru 70.7411:13.416:56:13.4P
London, England 73.1111:27.616:56:27.6P
Moscow, Russia 79.1712:02.116:57:02.1P
Beijing, China 79.8212:05.616:57:05.6P
Agana, Guam 81.2712:13.416:57:13.4P
Rome, Italy 85.9212:37.216:57:37.2P
Wellington, New Zealand 101.1313:47.116:58:47.1Pdiff
Kathmandu, Nepal 103.3113:56.816:58:56.8Pdiff
Brisbane, Australia 103.6913:58.516:58:58.5Pdiff
Palmer Station, Antarctica 120.6115:13.617:00:13.6Pdiff
Nairobi, Kenya 134.0516:13.217:01:13.2Pdiff

Travel Time Information and Calculator


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