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
Anchorage, Alaska 13.56 3:12.720:19:18.7Pn
Seattle, Washington 30.08 6:09.820:22:15.8P
Honolulu, Hawaii 32.63 6:32.220:22:38.2P
San Francisco, California 35.63 6:58.220:23:04.2P
Tokyo, Japan 39.33 7:29.620:23:35.6P
Los Angeles, California 40.63 7:40.420:23:46.4P
Phoenix, Arizona 44.78 8:14.120:24:20.1P
Golden, Colorado 44.81 8:14.320:24:20.3P
Albuquerque, New Mexico 46.98 8:31.420:24:37.4P
Duluth, Minnesota 48.03 8:39.620:24:45.6P
Beijing, China 50.57 8:59.020:25:05.0P
Wichita, Kansas 50.78 9:00.620:25:06.6P
Agana, Guam 53.43 9:20.420:25:26.4P
St. Louis, Missouri 54.31 9:26.820:25:32.8P
Ottawa, Canada 57.59 9:50.320:25:56.3P
Brownsville, Texas 59.0110:00.320:26:06.3P
Knoxville, Tennessee 59.1110:00.920:26:06.9P
Bangor, Maine 61.4810:17.220:26:23.2P
Washington, D.C. 61.5310:17.520:26:23.5P
Philadelphia, Pennsylvania 61.7610:19.120:26:25.1P
New York, New York 61.8210:19.520:26:25.5P
Boston, Massachusetts 62.1410:21.720:26:27.6P
Mexico City, Mexico 62.8610:26.520:26:32.5P
Bergen, Norway 67.1510:54.420:27:00.4P
Miami, Florida 69.4811:09.020:27:15.0P
Moscow, Russia 69.5811:09.620:27:15.6P
London, England 75.7411:46.320:27:52.3P
Kathmandu, Nepal 76.9911:53.420:27:59.4P
San Juan, Puerto Rico 83.2512:27.220:28:33.2P
Rome, Italy 85.7412:39.720:28:45.7P
Brisbane, Australia 86.3712:42.820:28:48.8P
Wellington, New Zealand 94.6413:21.520:29:27.5P
Lima, Peru 100.9513:49.720:29:55.7Pdiff
Nairobi, Kenya 124.2515:33.220:31:39.2Pdiff
Palmer Station, Antarctica 142.7116:55.120:33:01.1Pdiff

Travel Time Information and Calculator

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