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
Kathmandu, Nepal 14.98 3:21.418:28:18.4Pn
Moscow, Russia 29.57 5:45.018:30:42.0P
Beijing, China 35.49 6:36.318:31:33.3P
Rome, Italy 44.90 7:53.418:32:50.4P
Bergen, Norway 47.18 8:11.218:33:08.2P
Nairobi, Kenya 49.32 8:27.518:33:24.5P
London, England 51.29 8:42.318:33:39.3P
Tokyo, Japan 54.35 9:04.718:34:01.7P
Agana, Guam 69.0710:42.918:35:39.9P
Anchorage, Alaska 76.9611:29.218:36:26.2P
Bangor, Maine 91.1912:40.918:37:37.9P
Ottawa, Canada 93.0112:49.318:37:46.3P
Boston, Massachusetts 94.1712:54.518:37:51.5P
Seattle, Washington 95.1212:58.918:37:55.9P
Duluth, Minnesota 95.6613:01.318:37:58.3P
New York, New York 96.6413:05.718:38:02.7P
Philadelphia, Pennsylvania 97.7213:10.518:38:07.5P
Washington, D.C. 99.3113:17.618:38:14.6Pdiff
Brisbane, Australia 99.9313:20.318:38:17.3Pdiff
St. Louis, Missouri 103.1313:34.518:38:31.5Pdiff
Golden, Colorado 103.9413:38.118:38:35.1Pdiff
Knoxville, Tennessee 104.5013:40.618:38:37.6Pdiff
San Francisco, California 104.9413:42.618:38:39.6Pdiff
Wichita, Kansas 105.2213:43.818:38:40.8Pdiff
Honolulu, Hawaii 106.1813:48.118:38:45.1Pdiff
Albuquerque, New Mexico 108.6413:59.018:38:56.0Pdiff
Los Angeles, California 109.1714:01.318:38:58.3Pdiff
Phoenix, Arizona 110.2414:06.118:39:03.1Pdiff
San Juan, Puerto Rico 111.9114:13.518:39:10.5Pdiff
Miami, Florida 112.2914:15.218:39:12.2Pdiff
Brownsville, Texas 116.9014:35.618:39:32.6Pdiff
Wellington, New Zealand 122.2914:59.618:39:56.6Pdiff
Mexico City, Mexico 123.5215:05.018:40:02.0Pdiff
Palmer Station, Antarctica 140.0016:18.218:41:15.2Pdiff
Lima, Peru 142.3616:28.718:41:25.7Pdiff

Travel Time Information and Calculator

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