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 21.17 4:39.018:04:31.0P
Agana, Guam 22.01 4:48.018:04:40.0P
Wellington, New Zealand 39.15 7:20.118:07:12.1P
Tokyo, Japan 44.05 8:00.218:07:52.2P
Honolulu, Hawaii 53.95 9:15.818:09:07.8P
Beijing, China 57.99 9:44.718:09:36.7P
Kathmandu, Nepal 75.0111:33.318:11:25.3P
Anchorage, Alaska 79.7011:59.518:11:51.5P
San Francisco, California 88.1312:42.318:12:34.3P
Seattle, Washington 89.8412:50.318:12:42.3P
Los Angeles, California 90.9612:55.518:12:47.5P
Phoenix, Arizona 96.0213:18.718:13:10.7P
Albuquerque, New Mexico 100.5813:39.018:13:31.0Pdiff
Palmer Station, Antarctica 101.1913:41.718:13:33.7Pdiff
Golden, Colorado 101.6713:43.818:13:35.8Pdiff
Mexico City, Mexico 107.1614:08.218:14:00.2Pdiff
Wichita, Kansas 107.9414:11.718:14:03.7Pdiff
Brownsville, Texas 108.6314:14.718:14:06.7Pdiff
Moscow, Russia 110.2214:21.818:14:13.8Pdiff
Duluth, Minnesota 110.2614:22.018:14:14.0Pdiff
St. Louis, Missouri 113.3214:35.618:14:27.6Pdiff
Nairobi, Kenya 117.6214:54.718:14:46.7Pdiff
Knoxville, Tennessee 117.8514:55.718:14:47.7Pdiff
Bergen, Norway 121.3115:11.018:15:03.0Pdiff
Ottawa, Canada 121.4915:11.818:15:03.8Pdiff
Washington, D.C. 123.1815:19.318:15:11.3Pdiff
Philadelphia, Pennsylvania 124.1315:23.518:15:15.5Pdiff
Miami, Florida 124.1515:23.618:15:15.6Pdiff
New York, New York 124.6315:25.818:15:17.8Pdiff
Lima, Peru 125.3115:28.818:15:20.8Pdiff
Boston, Massachusetts 125.8815:31.318:15:23.3Pdiff
Bangor, Maine 126.1015:32.318:15:24.3Pdiff
London, England 130.3815:51.318:15:43.3Pdiff
Rome, Italy 131.2715:55.218:15:47.2Pdiff
San Juan, Puerto Rico 138.3316:26.618:16:18.6Pdiff

Travel Time Information and Calculator

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