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
Agana, Guam 7.77 1:50.317:45:42.3Pn
Tokyo, Japan 14.84 3:24.917:47:16.9Pn
Beijing, China 29.97 5:59.517:49:51.5P
Brisbane, Australia 49.23 8:38.817:52:30.8P
Kathmandu, Nepal 53.38 9:09.817:53:01.8P
Honolulu, Hawaii 53.92 9:13.817:53:05.8P
Anchorage, Alaska 60.12 9:57.617:53:49.6P
Wellington, New Zealand 68.4510:52.017:54:44.0P
Seattle, Washington 76.9611:42.417:55:34.4P
San Francisco, California 80.0111:59.217:55:51.2P
Moscow, Russia 81.4312:06.717:55:58.7P
Los Angeles, California 84.4812:22.417:56:14.4P
Phoenix, Arizona 89.4312:46.417:56:38.4P
Golden, Colorado 91.4912:55.917:56:47.9P
Bergen, Norway 92.0212:58.417:56:50.4P
Albuquerque, New Mexico 92.7313:01.617:56:53.6P
Duluth, Minnesota 95.4913:14.217:57:06.2P
Wichita, Kansas 97.7613:24.417:57:16.4P
London, England 101.0513:39.017:57:31.0Pdiff
St. Louis, Missouri 101.6913:41.917:57:33.9Pdiff
Rome, Italy 102.8313:46.917:57:38.9Pdiff
Brownsville, Texas 104.1513:52.817:57:44.8Pdiff
Ottawa, Canada 104.4613:54.217:57:46.2Pdiff
Mexico City, Mexico 106.1614:01.817:57:53.8Pdiff
Nairobi, Kenya 106.4614:03.017:57:55.0Pdiff
Knoxville, Tennessee 106.5214:03.317:57:55.3Pdiff
Bangor, Maine 107.7914:09.017:58:01.0Pdiff
Washington, D.C. 108.9014:13.917:58:05.9Pdiff
Boston, Massachusetts 108.9314:14.017:58:06.0Pdiff
New York, New York 108.9514:14.117:58:06.1Pdiff
Philadelphia, Pennsylvania 109.0014:14.417:58:06.4Pdiff
Miami, Florida 116.5814:48.017:58:40.0Pdiff
Palmer Station, Antarctica 130.2715:48.817:59:40.8Pdiff
San Juan, Puerto Rico 130.7115:50.717:59:42.7Pdiff
Lima, Peru 139.7416:30.818:00:22.8Pdiff

Travel Time Information and Calculator

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