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Earthquake Hazards Program


Wednesday, July 23, 2008 at 15:26:20 UTC

Theoretical P-Wave Travel Times

Theoretical P-wave Travel Times

This map shows 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
Tokyo, Japan 4.33 1:03.715:27:23.7Pn
Beijing, China 19.18 4:14.815:30:34.8P
Agana, Guam 26.38 5:25.815:31:45.8P
Anchorage, Alaska 46.10 8:12.715:34:32.7P
Kathmandu, Nepal 47.50 8:23.615:34:43.6P
Honolulu, Hawaii 54.44 9:15.615:35:35.6P
Moscow, Russia 65.0210:28.215:36:48.2P
Seattle, Washington 65.5410:31.515:36:51.5P
Brisbane, Australia 67.8010:45.815:37:05.8P
San Francisco, California 71.1411:06.415:37:26.4P
Bergen, Norway 73.9011:22.815:37:42.8P
Los Angeles, California 76.0811:35.315:37:55.3P
Golden, Colorado 80.2011:58.015:38:18.0P
Phoenix, Arizona 80.4111:59.115:38:19.1P
Duluth, Minnesota 81.4712:04.815:38:24.8P
Albuquerque, New Mexico 82.6212:10.815:38:30.8P
London, England 83.1112:13.315:38:33.3P
Wichita, Kansas 85.8712:27.215:38:47.2P
Wellington, New Zealand 86.2012:28.815:38:48.8P
Rome, Italy 86.4312:29.915:38:49.9P
St. Louis, Missouri 88.7112:40.815:39:00.8P
Ottawa, Canada 88.8712:41.515:39:01.5P
Bangor, Maine 91.5312:53.915:39:13.9P
Boston, Massachusetts 93.1113:01.215:39:21.2P
Knoxville, Tennessee 93.2813:01.915:39:21.9P
New York, New York 93.6213:03.515:39:23.5P
Philadephia, Pennsylvania 93.9013:04.815:39:24.8P
Washington, D.C. 94.1513:05.915:39:25.9P
Brownsville, Texas 94.6713:08.315:39:28.3P
Mexico City, Mexico 98.4213:25.215:39:45.2Pdiff
Nairobi, Kenya 102.0213:41.215:40:01.2Pdiff
Miami, Florida 104.1213:50.515:40:10.5Pdiff
San Juan, Puerto Rico 116.5814:45.815:41:05.8Pdiff
Lima, Peru 136.2816:13.215:42:33.2Pdiff
Palmer Station, Antarctica 148.6619:29.415:45:49.4PKPdf

Travel Time Information and Calculator

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

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