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Earthquake Hazards Program


Thursday, October 16, 2008 at 19:41:25 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
Mexico City, Mexico 8.07 1:54.419:43:26.4Pn
Brownsville, Texas 12.25 2:51.419:44:23.4Pn
Miami, Florida 15.99 3:40.219:45:12.2Pn
Knoxville, Tennessee 22.27 4:50.719:46:22.7P
Wichita, Kansas 23.52 5:03.219:46:35.2P
St. Louis, Missouri 24.09 5:08.419:46:40.4P
Albuquerque, New Mexico 24.11 5:08.619:46:40.6P
San Juan, Puerto Rico 25.48 5:21.119:46:53.1P
Phoenix, Arizona 25.92 5:25.019:46:57.0P
Golden, Colorado 27.49 5:39.119:47:11.1P
Washington, D.C. 27.77 5:41.719:47:13.7P
Philadephia, Pennsylvania 29.46 5:56.719:47:28.7P
Los Angeles, California 30.36 6:04.619:47:36.6P
Lima, Peru 30.54 6:06.219:47:38.2P
New York, New York 30.60 6:06.719:47:38.7P
Duluth, Minnesota 32.09 6:19.819:47:51.8P
Boston, Massachusetts 33.23 6:29.819:48:01.8P
Ottawa, Canada 33.84 6:35.019:48:07.0P
San Francisco, California 35.23 6:47.019:48:19.0P
Bangor, Maine 36.20 6:55.319:48:27.3P
Seattle, Washington 41.37 7:38.519:49:10.5P
Anchorage, Alaska 61.9410:11.819:51:43.8P
Honolulu, Hawaii 62.2410:13.819:51:45.8P
London, England 80.1412:01.919:53:33.9P
Bergen, Norway 81.2612:07.919:53:39.9P
Palmer Station, Antarctica 84.6512:25.319:53:57.3P
Rome, Italy 91.1412:56.419:54:28.4P
Moscow, Russia 98.4413:29.519:55:01.5Pdiff
Wellington, New Zealand 101.5313:43.219:55:15.2Pdiff
Tokyo, Japan 109.8014:20.019:55:52.0Pdiff
Agana, Guam 116.9414:51.719:56:23.7Pdiff
Brisbane, Australia 118.2114:57.319:56:29.3Pdiff
Beijing, China 119.5215:03.119:56:35.1Pdiff
Nairobi, Kenya 128.1715:41.519:57:13.5Pdiff
Kathmandu, Nepal 137.9416:24.919:57:56.9Pdiff

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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