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Earthquake Hazards Program


Monday, August 10, 2009 at 20:07:07 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 1.52 0:25.520:07:32.5Pn
Beijing, China 18.12 4:09.720:11:16.7Pn
Agana, Guam 21.96 4:51.620:11:58.6P
Kathmandu, Nepal 45.41 8:16.120:15:23.1P
Anchorage, Alaska 51.64 9:04.120:16:11.1P
Honolulu, Hawaii 57.12 9:44.020:16:51.0P
Brisbane, Australia 63.4310:27.320:17:34.3P
Moscow, Russia 67.5310:53.820:18:00.8P
Seattle, Washington 70.8511:14.420:18:21.4P
San Francisco, California 76.0911:45.320:18:52.3P
Bergen, Norway 77.6811:54.220:19:01.2P
Los Angeles, California 80.9912:12.220:19:19.2P
Wellington, New Zealand 82.7412:21.420:19:28.4P
Phoenix, Arizona 85.4412:35.220:19:42.2P
Golden, Colorado 85.5512:35.720:19:42.7P
London, England 86.7212:41.520:19:48.5P
Duluth, Minnesota 87.0812:43.220:19:50.2P
Albuquerque, New Mexico 87.8212:46.820:19:53.8P
Rome, Italy 89.0012:52.320:19:59.3P
Wichita, Kansas 91.3113:03.120:20:10.1P
St. Louis, Missouri 94.2613:16.620:20:23.6P
Ottawa, Canada 94.5013:17.820:20:24.8P
Bangor, Maine 97.1313:29.620:20:36.6P
Boston, Massachusetts 98.7413:36.820:20:43.8Pdiff
Knoxville, Tennessee 98.8513:37.320:20:44.3Pdiff
New York, New York 99.2613:39.120:20:46.1Pdiff
Philadelphia, Pennsylvania 99.5413:40.420:20:47.4Pdiff
Washington, D.C. 99.7913:41.420:20:48.4Pdiff
Brownsville, Texas 99.8413:41.720:20:48.7Pdiff
Nairobi, Kenya 100.1413:43.020:20:50.0Pdiff
Mexico City, Mexico 103.3513:57.320:21:04.3Pdiff
Miami, Florida 109.6614:25.320:21:32.3Pdiff
San Juan, Puerto Rico 122.2215:21.020:22:28.0Pdiff
Lima, Peru 140.8416:43.720:23:50.7Pdiff
Palmer Station, Antarctica 144.5217:00.020:24:07.0Pdiff

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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