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 16.07 3:45.017:51:35.0Pn
Moscow, Russia 28.42 5:53.617:53:43.6P
Beijing, China 35.86 6:58.717:54:48.7P
Rome, Italy 43.88 8:05.317:55:55.3P
Bergen, Norway 46.03 8:22.517:56:12.5P
Nairobi, Kenya 49.42 8:48.717:56:38.7P
London, England 50.17 8:54.417:56:44.4P
Tokyo, Japan 54.69 9:28.017:57:18.0P
Agana, Guam 69.7511:09.117:58:59.1P
Anchorage, Alaska 76.3311:48.117:59:38.1P
Bangor, Maine 90.0612:58.718:00:48.7P
Ottawa, Canada 91.9013:07.318:00:57.3P
Boston, Massachusetts 93.0413:12.518:01:02.5P
Seattle, Washington 94.3313:18.418:01:08.4P
Duluth, Minnesota 94.6313:19.818:01:09.8P
New York, New York 95.5113:23.818:01:13.8P
Philadelphia, Pennsylvania 96.6013:28.718:01:18.7P
Washington, D.C. 98.1913:35.818:01:25.8P
Brisbane, Australia 100.9713:48.218:01:38.2Pdiff
St. Louis, Missouri 102.0713:53.118:01:43.1Pdiff
Golden, Colorado 102.9913:57.118:01:47.1Pdiff
Knoxville, Tennessee 103.4113:59.018:01:49.0Pdiff
San Francisco, California 104.1814:02.418:01:52.4Pdiff
Wichita, Kansas 104.2014:02.518:01:52.5Pdiff
Honolulu, Hawaii 106.0714:10.818:02:00.8Pdiff
Albuquerque, New Mexico 107.7014:18.118:02:08.1Pdiff
Los Angeles, California 108.3614:21.018:02:11.0Pdiff
Phoenix, Arizona 109.3614:25.418:02:15.4Pdiff
San Juan, Puerto Rico 110.7714:31.718:02:21.7Pdiff
Miami, Florida 111.1614:33.418:02:23.4Pdiff
Brownsville, Texas 115.8614:54.318:02:44.3Pdiff
Mexico City, Mexico 122.4815:23.718:03:13.7Pdiff
Wellington, New Zealand 123.3515:27.518:03:17.5Pdiff
Palmer Station, Antarctica 140.5316:43.818:04:33.8Pdiff
Lima, Peru 141.2816:47.118:04:37.1Pdiff

Travel Time Information and Calculator

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