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
Brisbane, Australia 19.80 4:30.414:10:26.4P
Wellington, New Zealand 31.38 6:20.914:12:16.9P
Agana, Guam 31.44 6:21.514:12:17.5P
Honolulu, Hawaii 48.77 8:44.914:14:40.9P
Tokyo, Japan 52.13 9:10.314:15:06.3P
Beijing, China 67.6610:57.214:16:53.2P
Anchorage, Alaska 80.3212:11.314:18:07.3P
San Francisco, California 83.4212:27.614:18:23.6P
Los Angeles, California 85.5112:38.114:18:34.1P
Kathmandu, Nepal 85.9412:40.314:18:36.3P
Seattle, Washington 86.8612:44.814:18:40.8P
Phoenix, Arizona 90.3313:01.214:18:57.2P
Palmer Station, Antarctica 94.0113:18.214:19:14.2P
Albuquerque, New Mexico 95.0713:23.014:19:19.0P
Golden, Colorado 96.9413:31.414:19:27.4P
Mexico City, Mexico 99.2013:41.514:19:37.5Pdiff
Brownsville, Texas 101.5813:52.114:19:48.1Pdiff
Wichita, Kansas 102.8313:57.714:19:53.7Pdiff
Duluth, Minnesota 106.8614:15.514:20:11.5Pdiff
St. Louis, Missouri 108.4414:22.514:20:18.5Pdiff
Knoxville, Tennessee 112.5614:40.814:20:36.8Pdiff
Lima, Peru 114.4014:49.014:20:45.0Pdiff
Miami, Florida 117.1515:01.214:20:57.2Pdiff
Ottawa, Canada 118.3615:06.614:21:02.6Pdiff
Washington, D.C. 118.7015:08.114:21:04.1Pdiff
Moscow, Russia 119.4615:11.414:21:07.4Pdiff
Philadelphia, Pennsylvania 119.9415:13.614:21:09.6Pdiff
New York, New York 120.6515:16.714:21:12.7Pdiff
Boston, Massachusetts 122.3915:24.414:21:20.4Pdiff
Bangor, Maine 123.2615:28.314:21:24.3Pdiff
Nairobi, Kenya 126.8615:44.314:21:40.3Pdiff
Bergen, Norway 128.4415:51.314:21:47.3Pdiff
San Juan, Puerto Rico 130.3015:59.614:21:55.6Pdiff
London, England 137.8316:33.014:22:29.0Pdiff
Rome, Italy 140.8716:46.514:22:42.5Pdiff

Travel Time Information and Calculator

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