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 12.28 2:54.419:15:55.4Pn
Beijing, China 18.69 4:17.819:17:18.8P
Tokyo, Japan 37.58 7:13.919:20:14.9P
Moscow, Russia 39.84 7:32.819:20:33.8P
Agana, Guam 52.45 9:12.119:22:13.1P
Bergen, Norway 56.07 9:38.519:22:39.5P
Rome, Italy 58.98 9:59.019:22:60.0P
London, England 62.4810:22.819:23:23.8P
Nairobi, Kenya 64.5210:36.419:23:37.4P
Anchorage, Alaska 68.5511:02.119:24:03.1P
Brisbane, Australia 86.7212:43.519:25:44.5P
Seattle, Washington 88.7012:52.919:25:53.9P
Honolulu, Hawaii 91.3713:05.319:26:06.3P
Duluth, Minnesota 95.0413:22.219:26:23.2P
Bangor, Maine 95.3613:23.719:26:24.7P
Ottawa, Canada 95.7913:25.619:26:26.6P
San Francisco, California 97.6213:33.819:26:34.8P
Boston, Massachusetts 98.1613:36.219:26:37.2P
New York, New York 100.2013:45.319:26:46.3Pdiff
Golden, Colorado 100.4913:46.619:26:47.6Pdiff
Philadelphia, Pennsylvania 101.1013:49.319:26:50.3Pdiff
Washington, D.C. 102.3813:55.019:26:56.0Pdiff
Los Angeles, California 102.4313:55.219:26:56.2Pdiff
St. Louis, Missouri 103.1813:58.519:26:59.5Pdiff
Wichita, Kansas 103.5914:00.419:27:01.4Pdiff
Albuquerque, New Mexico 104.7114:05.319:27:06.3Pdiff
Phoenix, Arizona 104.9114:06.219:27:07.2Pdiff
Knoxville, Tennessee 105.9014:10.619:27:11.6Pdiff
Wellington, New Zealand 109.2314:25.419:27:26.4Pdiff
Brownsville, Texas 115.2814:52.219:27:53.2Pdiff
Miami, Florida 115.7014:54.119:27:55.1Pdiff
San Juan, Puerto Rico 119.8415:12.519:28:13.5Pdiff
Mexico City, Mexico 121.3915:19.319:28:20.3Pdiff
Palmer Station, Antarctica 147.8819:42.119:32:43.1PKPdf
Lima, Peru 152.0719:48.919:32:49.9PKPdf

Travel Time Information and Calculator

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