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 19.74 4:26.722:34:10.7P
Wellington, New Zealand 30.98 6:13.822:35:57.8P
Agana, Guam 31.94 6:22.322:36:06.3P
Honolulu, Hawaii 48.69 8:40.622:38:24.6P
Tokyo, Japan 52.59 9:10.122:38:54.1P
Beijing, China 68.1610:56.622:40:40.6P
Anchorage, Alaska 80.4912:08.322:41:52.3P
San Francisco, California 83.3212:23.222:42:07.2P
Los Angeles, California 85.3812:33.622:42:17.6P
Kathmandu, Nepal 86.4412:38.922:42:22.9P
Seattle, Washington 86.8512:40.922:42:24.9P
Phoenix, Arizona 90.1812:56.622:42:40.6P
Palmer Station, Antarctica 93.5913:12.422:42:56.4P
Albuquerque, New Mexico 94.9213:18.422:43:02.4P
Golden, Colorado 96.8313:27.122:43:11.1P
Mexico City, Mexico 98.9213:36.422:43:20.4Pdiff
Brownsville, Texas 101.3513:47.222:43:31.2Pdiff
Wichita, Kansas 102.7113:53.222:43:37.2Pdiff
Duluth, Minnesota 106.8114:11.422:43:55.4Pdiff
St. Louis, Missouri 108.3214:18.122:44:02.1Pdiff
Knoxville, Tennessee 112.4214:36.322:44:20.3Pdiff
Lima, Peru 113.9314:43.022:44:27.0Pdiff
Miami, Florida 116.9114:56.222:44:40.2Pdiff
Ottawa, Canada 118.3215:02.522:44:46.5Pdiff
Washington, D.C. 118.5915:03.722:44:47.7Pdiff
Philadelphia, Pennsylvania 119.8415:09.222:44:53.2Pdiff
Moscow, Russia 119.9315:09.622:44:53.6Pdiff
New York, New York 120.5615:12.422:44:56.4Pdiff
Boston, Massachusetts 122.3215:20.222:45:04.2Pdiff
Bangor, Maine 123.2215:24.222:45:08.2Pdiff
Nairobi, Kenya 127.1915:41.922:45:25.9Pdiff
Bergen, Norway 128.8415:49.222:45:33.2Pdiff
San Juan, Puerto Rico 130.0115:54.422:45:38.4Pdiff
London, England 138.2316:30.922:46:14.9Pdiff
Rome, Italy 141.3516:44.722:46:28.7Pdiff

Travel Time Information and Calculator

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