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
Tokyo, Japan 0.26 0:11.320:03:09.3Pn
Beijing, China 19.14 4:17.220:07:15.2P
Agana, Guam 22.36 4:51.820:07:49.8P
Kathmandu, Nepal 46.72 8:21.420:11:19.4P
Anchorage, Alaska 50.18 8:48.020:11:46.0P
Honolulu, Hawaii 55.66 9:28.420:12:26.4P
Brisbane, Australia 63.8510:24.720:13:22.7P
Moscow, Russia 67.7510:49.820:13:47.8P
Seattle, Washington 69.3010:59.420:13:57.4P
San Francisco, California 74.4911:30.520:14:28.5P
Bergen, Norway 77.4811:47.520:14:45.5P
Los Angeles, California 79.3911:58.020:14:56.0P
Wellington, New Zealand 82.8112:16.220:15:14.2P
Phoenix, Arizona 83.8512:21.520:15:19.5P
Golden, Colorado 84.0112:22.320:15:20.3P
Duluth, Minnesota 85.6612:30.620:15:28.6P
Albuquerque, New Mexico 86.2512:33.520:15:31.5P
London, England 86.5812:35.120:15:33.1P
Rome, Italy 89.2212:47.620:15:45.6P
Wichita, Kansas 89.8012:50.320:15:48.3P
St. Louis, Missouri 92.7913:04.220:16:02.2P
Ottawa, Canada 93.2213:06.220:16:04.2P
Bangor, Maine 95.9313:18.520:16:16.5P
Knoxville, Tennessee 97.4113:25.120:16:23.1P
Boston, Massachusetts 97.4813:25.520:16:23.5P
New York, New York 97.9613:27.620:16:25.6P
Philadelphia, Pennsylvania 98.2213:28.820:16:26.8Pdiff
Brownsville, Texas 98.2613:28.920:16:26.9Pdiff
Washington, D.C. 98.4413:29.720:16:27.7Pdiff
Nairobi, Kenya 101.4613:43.120:16:41.1Pdiff
Mexico City, Mexico 101.7513:44.420:16:42.4Pdiff
Miami, Florida 108.1914:13.020:17:11.0Pdiff
San Juan, Puerto Rico 120.8715:09.320:18:07.3Pdiff
Lima, Peru 139.2316:30.820:19:28.8Pdiff
Palmer Station, Antarctica 144.9116:56.020:19:54.0Pdiff

Travel Time Information and Calculator

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