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 20.22 4:34.517:54:20.5P
Wellington, New Zealand 30.92 6:16.217:56:02.2P
Agana, Guam 32.30 6:28.417:56:14.4P
Honolulu, Hawaii 48.10 8:39.117:58:25.1P
Tokyo, Japan 52.80 9:14.617:59:00.6P
Beijing, China 68.5011:01.818:00:47.8P
Anchorage, Alaska 80.1512:09.718:01:55.7P
San Francisco, California 82.7312:23.418:02:09.4P
Los Angeles, California 84.7612:33.718:02:19.7P
Seattle, Washington 86.3312:41.518:02:27.5P
Kathmandu, Nepal 86.9912:44.718:02:30.7P
Phoenix, Arizona 89.5512:56.918:02:42.9P
Palmer Station, Antarctica 93.5013:15.118:03:01.1P
Albuquerque, New Mexico 94.3013:18.818:03:04.8P
Golden, Colorado 96.2313:27.618:03:13.6P
Mexico City, Mexico 98.2413:36.618:03:22.6P
Brownsville, Texas 100.6813:47.418:03:33.4Pdiff
Wichita, Kansas 102.0913:53.718:03:39.7Pdiff
Duluth, Minnesota 106.2514:12.118:03:58.1Pdiff
St. Louis, Missouri 107.7014:18.618:04:04.6Pdiff
Knoxville, Tennessee 111.7914:36.718:04:22.7Pdiff
Lima, Peru 113.3114:43.518:04:29.5Pdiff
Miami, Florida 116.2414:56.518:04:42.5Pdiff
Ottawa, Canada 117.7615:03.218:04:49.2Pdiff
Washington, D.C. 117.9815:04.218:04:50.2Pdiff
Philadelphia, Pennsylvania 119.2415:09.818:04:55.8Pdiff
New York, New York 119.9715:13.018:04:59.0Pdiff
Moscow, Russia 120.1915:14.018:05:00.0Pdiff
Boston, Massachusetts 121.7415:20.918:05:06.9Pdiff
Bangor, Maine 122.6715:25.018:05:11.0Pdiff
Nairobi, Kenya 127.8915:48.218:05:34.2Pdiff
Bergen, Norway 128.8815:52.618:05:38.6Pdiff
San Juan, Puerto Rico 129.3115:54.518:05:40.5Pdiff
London, England 138.2816:34.318:06:20.3Pdiff
Rome, Italy 141.6316:49.218:06:35.2Pdiff

Travel Time Information and Calculator

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