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 20.39 4:25.319:36:12.3P
Tokyo, Japan 33.50 6:25.319:38:12.3P
Beijing, China 36.40 6:50.119:38:37.1P
Brisbane, Australia 40.96 7:28.119:39:15.1P
Kathmandu, Nepal 45.25 8:02.519:39:49.5P
Wellington, New Zealand 63.4810:14.419:42:01.4P
Honolulu, Hawaii 75.3411:27.319:43:14.3P
Anchorage, Alaska 83.2012:09.819:43:56.8P
Moscow, Russia 85.5112:21.419:44:08.5P
Nairobi, Kenya 89.4612:40.319:44:27.3P
Bergen, Norway 100.8013:31.719:45:18.7Pdiff
Seattle, Washington 100.9313:32.319:45:19.2Pdiff
San Francisco, California 103.9613:45.719:45:32.7Pdiff
Rome, Italy 104.3613:47.519:45:34.5Pdiff
London, England 108.0314:03.819:45:50.8Pdiff
Los Angeles, California 108.3314:05.119:45:52.1Pdiff
Phoenix, Arizona 113.3514:27.419:46:14.4Pdiff
Golden, Colorado 115.5114:37.019:46:24.0Pdiff
Palmer Station, Antarctica 116.3914:40.919:46:27.9Pdiff
Albuquerque, New Mexico 116.7514:42.519:46:29.5Pdiff
Duluth, Minnesota 118.8114:51.619:46:38.6Pdiff
Wichita, Kansas 121.7415:04.719:46:51.7Pdiff
St. Louis, Missouri 125.4615:21.219:47:08.2Pdiff
Ottawa, Canada 126.6615:26.519:47:13.5Pdiff
Brownsville, Texas 128.0215:32.519:47:19.5Pdiff
Bangor, Maine 129.1915:37.719:47:24.7Pdiff
Mexico City, Mexico 129.4815:39.019:47:26.0Pdiff
Knoxville, Tennessee 130.2415:42.419:47:29.4Pdiff
Boston, Massachusetts 130.8815:45.219:47:32.2Pdiff
New York, New York 131.4115:47.619:47:34.6Pdiff
Philadelphia, Pennsylvania 131.6615:48.719:47:35.7Pdiff
Washington, D.C. 131.8315:49.419:47:36.4Pdiff
Miami, Florida 140.5616:28.219:48:15.2Pdiff
San Juan, Puerto Rico 154.1919:35.119:51:22.1PKPdf
Lima, Peru 155.7919:37.419:51:24.4PKPdf

Travel Time Information and Calculator

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