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Earthquake Hazards Program

Theoretical P-Wave Travel Times

Friday, August 11, 2006 at 14:30:40 UTC

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 1.83 0:30.114:31:14.1Pn
Brownsville, Texas 7.90 1:52.114:32:36.1Pn
Albuquerque, New Mexico 17.17 3:53.814:34:37.8Pn
Phoenix, Arizona 17.83 4:01.314:34:45.3P
Wichita, Kansas 19.33 4:17.714:35:01.7P
Miami, Florida 20.45 4:29.814:35:13.8P
Golden, Colorado 21.38 4:39.814:35:23.8P
Los Angeles, California 21.80 4:44.214:35:28.2P
St. Louis, Missouri 22.02 4:46.614:35:30.6P
Knoxville, Tennessee 22.17 4:48.114:35:32.1P
San Francisco, California 26.78 5:31.014:36:15.0P
Washington, D.C. 28.94 5:50.114:36:34.1P
Duluth, Minnesota 28.96 5:50.414:36:34.4P
Philadephia, Pennsylvania 30.73 6:06.014:36:50.0P
New York, New York 31.89 6:16.214:37:00.2P
San Juan, Puerto Rico 32.94 6:25.314:37:09.3P
Ottawa, Canada 33.93 6:33.914:37:17.9P
Seattle, Washington 33.94 6:34.014:37:18.0P
Boston, Massachusetts 34.62 6:39.814:37:23.8P
Bangor, Maine 37.39 7:03.514:37:47.4P
Lima, Peru 38.54 7:13.114:37:57.1P
Honolulu, Hawaii 53.33 9:09.214:39:53.2P
Anchorage, Alaska 54.63 9:18.714:40:02.7P
Bergen, Norway 81.7412:08.114:42:52.1P
London, England 82.1212:10.114:42:54.1P
Palmer Station, Antarctica 90.2712:50.014:43:34.0P
Rome, Italy 94.0313:07.414:43:51.4P
Wellington, New Zealand 97.9113:24.914:44:08.9P
Moscow, Russia 98.0813:25.614:44:09.6P
Tokyo, Japan 101.2013:39.514:44:23.5Pdiff
Agana, Guam 107.8714:09.114:44:53.1Pdiff
Beijing, China 112.1514:28.114:45:12.1Pdiff
Brisbane, Australia 112.2814:28.714:45:12.7Pdiff
Kathmandu, Nepal 133.5716:03.114:46:47.1Pdiff
Nairobi, Kenya 135.1316:10.114:46:54.1Pdiff

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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