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Earthquake Hazards Program


Saturday, September 12, 2009 at 20:06:24 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
San Juan, Puerto Rico 7.91 1:55.120:08:19.1Pn
Miami, Florida 18.92 4:20.920:10:44.9P
Lima, Peru 24.40 5:18.520:11:42.5P
Washington, D.C. 29.20 6:01.720:12:25.7P
Knoxville, Tennessee 29.57 6:05.020:12:29.0P
Philadelphia, Pennsylvania 29.81 6:07.020:12:31.0P
New York, New York 30.35 6:11.820:12:35.8P
Mexico City, Mexico 31.31 6:20.320:12:44.3P
Boston, Massachusetts 31.61 6:22.920:12:46.9P
Brownsville, Texas 31.75 6:24.220:12:48.2P
Bangor, Maine 33.96 6:43.520:13:07.5P
St. Louis, Missouri 34.23 6:45.820:13:09.8P
Ottawa, Canada 35.21 6:54.220:13:18.2P
Wichita, Kansas 37.68 7:15.420:13:39.4P
Duluth, Minnesota 41.36 7:46.020:14:10.0P
Albuquerque, New Mexico 42.70 7:56.920:14:20.9P
Golden, Colorado 43.88 8:06.420:14:30.4P
Phoenix, Arizona 46.27 8:25.520:14:49.5P
Los Angeles, California 51.37 9:04.620:15:28.6P
San Francisco, California 55.58 9:35.620:15:59.6P
Seattle, Washington 58.50 9:56.320:16:20.3P
London, England 67.8810:58.620:17:22.6P
Bergen, Norway 72.4911:26.920:17:50.9P
Rome, Italy 75.8411:46.420:18:10.4P
Anchorage, Alaska 76.8011:51.920:18:15.9P
Palmer Station, Antarctica 78.3312:00.520:18:24.5P
Honolulu, Hawaii 86.0612:40.920:19:04.9P
Moscow, Russia 89.8612:59.020:19:23.0P
Nairobi, Kenya 104.7614:06.220:20:30.2Pdiff
Wellington, New Zealand 117.4415:02.520:21:26.5Pdiff
Tokyo, Japan 126.9715:44.820:22:08.8Pdiff
Beijing, China 129.4715:55.920:22:19.9Pdiff
Kathmandu, Nepal 133.8616:15.420:22:39.4Pdiff
Brisbane, Australia 138.0916:34.220:22:58.2Pdiff
Agana, Guam 139.6316:41.020:23:05.0Pdiff

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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