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 20.15 4:35.420:14:29.5P
Wellington, New Zealand 31.21 6:20.620:16:14.6P
Agana, Guam 31.88 6:26.520:16:20.5P
Honolulu, Hawaii 48.28 8:42.320:18:36.3P
Tokyo, Japan 52.44 9:13.820:19:07.8P
Beijing, China 68.0911:01.220:20:55.2P
Anchorage, Alaska 80.1012:11.420:22:05.4P
San Francisco, California 82.9212:26.320:22:20.3P
Los Angeles, California 84.9712:36.820:22:30.8P
Seattle, Washington 86.4412:44.120:22:38.1P
Kathmandu, Nepal 86.5312:44.520:22:38.5P
Phoenix, Arizona 89.7812:60.020:22:54.0P
Palmer Station, Antarctica 93.8113:18.620:23:12.6P
Albuquerque, New Mexico 94.5213:21.820:23:15.8P
Golden, Colorado 96.4213:30.520:23:24.5P
Mexico City, Mexico 98.5713:40.020:23:34.0Pdiff
Brownsville, Texas 100.9813:50.720:23:44.7Pdiff
Wichita, Kansas 102.3013:56.620:23:50.6Pdiff
Duluth, Minnesota 106.4014:14.820:24:08.8Pdiff
St. Louis, Missouri 107.9114:21.520:24:15.5Pdiff
Knoxville, Tennessee 112.0214:39.720:24:33.8Pdiff
Lima, Peru 113.7714:47.520:24:41.5Pdiff
Miami, Florida 116.5414:59.820:24:53.8Pdiff
Ottawa, Canada 117.9015:05.920:24:59.9Pdiff
Washington, D.C. 118.1815:07.120:25:01.1Pdiff
Philadelphia, Pennsylvania 119.4315:12.720:25:06.7Pdiff
Moscow, Russia 119.8115:14.320:25:08.3Pdiff
New York, New York 120.1515:15.920:25:09.9Pdiff
Boston, Massachusetts 121.9115:23.620:25:17.6Pdiff
Bangor, Maine 122.8115:27.620:25:21.6Pdiff
Nairobi, Kenya 127.5215:48.520:25:42.5Pdiff
Bergen, Norway 128.6015:53.420:25:47.4Pdiff
San Juan, Puerto Rico 129.6615:58.120:25:52.1Pdiff
London, England 138.0016:35.120:26:29.1Pdiff
Rome, Italy 141.2416:49.520:26:43.5Pdiff

Travel Time Information and Calculator

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