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Earthquake Hazards Program

Theoretical P-Wave Travel Times

Saturday, October 23, 2004 at 08:56:00 UTC

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

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 1.78 0:30.0 8:56:30.0Pn
Beijing, China 17.63 4:04.8 9:00:04.8Pn
Agana, Guam 24.28 5:16.4 9:01:16.4P
Kathmandu, Nepal 45.54 8:18.7 9:04:18.7P
Anchorage, Alaska 49.42 8:48.9 9:04:48.9P
Honolulu, Hawaii 56.61 9:42.0 9:05:42.0P
Moscow, Russia 65.7510:44.1 9:06:44.1P
Brisbane, Australia 65.7710:44.2 9:06:44.2P
Seattle, Washington 68.8311:03.6 9:07:03.6P
San Francisco, California 74.3311:36.8 9:07:36.8P
Bergen, Norway 75.4911:43.5 9:07:43.5P
Los Angeles, California 79.2612:04.6 9:08:04.6P
Golden, Colorado 83.5012:27.0 9:08:27.0P
London, England 84.5912:32.5 9:08:32.5P
Duluth, Minnesota 84.7712:33.5 9:08:33.5P
Wellington, New Zealand 84.8212:33.7 9:08:33.7P
Albuquerque, New Mexico 85.8912:39.0 9:08:39.0P
Rome, Italy 87.2212:45.6 9:08:45.6P
Wichita, Kansas 89.1912:54.9 9:08:54.9P
St. Louis, Missouri 92.0213:08.1 9:09:08.1P
Ottawa, Canada 92.0613:08.2 9:09:08.2P
Bangor, Maine 94.6513:20.1 9:09:20.1P
Boston, Massachusetts 96.2813:27.5 9:09:27.5P
Knoxville, Tennessee 96.5813:28.9 9:09:28.9P
New York, New York 96.8313:30.0 9:09:30.0P
Philadephia, Pennsylvania 97.1213:31.3 9:09:31.3P
Washington, D.C. 97.4013:32.5 9:09:32.5P
Brownsville, Texas 97.9313:34.9 9:09:34.9P
Nairobi, Kenya 100.2413:45.1 9:09:45.1Pdiff
Mexico City, Mexico 101.6213:51.3 9:09:51.3Pdiff
Miami, Florida 107.4414:17.1 9:10:17.1Pdiff
San Juan, Puerto Rico 119.8315:12.1 9:11:12.1Pdiff
Lima, Peru 139.3616:38.8 9:12:38.8Pdiff
Palmer Station, Antarctica 146.8519:38.9 9:15:38.9PKPdf

Travel Time Information and Calculator


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