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
Brisbane, Australia 20.42 4:37.220:24:43.2P
Wellington, New Zealand 31.34 6:20.520:26:26.5P
Agana, Guam 31.88 6:25.320:26:31.3P
Honolulu, Hawaii 48.00 8:39.020:28:45.0P
Tokyo, Japan 52.37 9:12.120:29:18.1P
Beijing, China 68.0810:59.920:31:05.9P
Anchorage, Alaska 79.8612:08.820:32:14.8P
San Francisco, California 82.6412:23.620:32:29.6P
Los Angeles, California 84.7012:34.120:32:40.1P
Seattle, Washington 86.1712:41.420:32:47.4P
Kathmandu, Nepal 86.6312:43.720:32:49.7P
Phoenix, Arizona 89.5112:57.420:33:03.4P
Palmer Station, Antarctica 93.9213:17.820:33:23.8P
Albuquerque, New Mexico 94.2513:19.320:33:25.3P
Golden, Colorado 96.1513:27.920:33:33.9P
Mexico City, Mexico 98.3213:37.620:33:43.6P
Brownsville, Texas 100.7113:48.320:33:54.3Pdiff
Wichita, Kansas 102.0313:54.120:34:00.1Pdiff
Duluth, Minnesota 106.1314:12.320:34:18.3Pdiff
St. Louis, Missouri 107.6414:19.020:34:25.0Pdiff
Knoxville, Tennessee 111.7514:37.220:34:43.2Pdiff
Lima, Peru 113.6314:45.620:34:51.6Pdiff
Miami, Florida 116.2814:57.320:35:03.3Pdiff
Ottawa, Canada 117.6315:03.420:35:09.4Pdiff
Washington, D.C. 117.9115:04.620:35:10.6Pdiff
Philadelphia, Pennsylvania 119.1615:10.120:35:16.1Pdiff
Moscow, Russia 119.7615:12.820:35:18.8Pdiff
New York, New York 119.8815:13.320:35:19.3Pdiff
Boston, Massachusetts 121.6415:21.120:35:27.1Pdiff
Bangor, Maine 122.5315:25.120:35:31.1Pdiff
Nairobi, Kenya 127.7515:48.320:35:54.3Pdiff
Bergen, Norway 128.4715:51.520:35:57.5Pdiff
San Juan, Puerto Rico 129.4215:55.720:36:01.7Pdiff
London, England 137.8716:33.220:36:39.2Pdiff
Rome, Italy 141.2016:48.020:36:54.0Pdiff

Travel Time Information and Calculator

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