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 10.04 2:21.518:30:07.5Pn
Beijing, China 18.40 4:11.418:31:57.4P
Tokyo, Japan 36.60 7:01.918:34:47.9P
Moscow, Russia 45.63 8:15.918:36:01.9P
Agana, Guam 48.86 8:41.118:36:27.1P
Bergen, Norway 62.1310:16.518:38:02.5P
Rome, Italy 64.1010:29.718:38:15.7P
Nairobi, Kenya 64.6610:33.318:38:19.3P
London, England 68.2910:56.518:38:42.5P
Anchorage, Alaska 72.5011:22.318:39:08.3P
Brisbane, Australia 81.2012:11.318:39:57.3P
Honolulu, Hawaii 91.8813:03.518:40:49.5P
Seattle, Washington 92.9713:08.618:40:54.6P
Duluth, Minnesota 100.5613:42.718:41:28.7Pdiff
Bangor, Maine 101.4513:46.718:41:32.7Pdiff
San Francisco, California 101.4913:46.918:41:32.9Pdiff
Ottawa, Canada 101.7613:48.018:41:34.0Pdiff
Wellington, New Zealand 103.7513:56.918:41:42.9Pdiff
Boston, Massachusetts 104.2313:59.018:41:45.0Pdiff
Golden, Colorado 105.3814:04.118:41:50.1Pdiff
New York, New York 106.2214:07.918:41:53.9Pdiff
Los Angeles, California 106.4114:08.718:41:54.7Pdiff
Philadelphia, Pennsylvania 107.1114:11.818:41:57.8Pdiff
Washington, D.C. 108.3514:17.318:42:03.3Pdiff
St. Louis, Missouri 108.7414:19.018:42:05.0Pdiff
Wichita, Kansas 108.8414:19.518:42:05.5Pdiff
Phoenix, Arizona 109.2514:21.318:42:07.3Pdiff
Albuquerque, New Mexico 109.4214:22.118:42:08.1Pdiff
Knoxville, Tennessee 111.6414:31.918:42:17.9Pdiff
Brownsville, Texas 120.3915:10.718:42:56.7Pdiff
Miami, Florida 121.6315:16.318:43:02.3Pdiff
San Juan, Puerto Rico 126.0415:35.818:43:21.8Pdiff
Mexico City, Mexico 126.2815:36.918:43:22.9Pdiff
Palmer Station, Antarctica 142.9716:51.018:44:37.0Pdiff
Lima, Peru 158.2719:53.418:47:39.4PKPdf

Travel Time Information and Calculator

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