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
Beijing, China 14.90 3:30.422:14:01.4Pn
Kathmandu, Nepal 17.37 4:02.222:14:33.2Pn
Tokyo, Japan 30.26 6:10.722:16:41.7P
Agana, Guam 39.81 7:32.822:18:03.8P
Moscow, Russia 54.38 9:26.522:19:57.5P
Bergen, Norway 70.3111:13.322:21:44.4P
Nairobi, Kenya 71.4911:20.522:21:51.5P
Brisbane, Australia 72.1611:24.622:21:55.6P
Anchorage, Alaska 72.4011:26.022:21:57.0P
Rome, Italy 73.3811:31.822:22:02.8P
London, England 76.9911:52.622:22:23.6P
Honolulu, Hawaii 86.1112:40.822:23:11.8P
Seattle, Washington 93.0913:13.622:23:44.6P
Wellington, New Zealand 94.6813:20.922:23:51.9P
San Francisco, California 100.6313:47.522:24:18.5Pdiff
Duluth, Minnesota 103.6414:00.922:24:31.9Pdiff
Los Angeles, California 105.6514:09.822:24:40.8Pdiff
Ottawa, Canada 106.5614:13.922:24:44.9Pdiff
Golden, Colorado 106.6414:14.222:24:45.2Pdiff
Bangor, Maine 106.9614:15.622:24:46.6Pdiff
Phoenix, Arizona 109.1914:25.622:24:56.6Pdiff
Boston, Massachusetts 109.5514:27.222:24:58.2Pdiff
Albuquerque, New Mexico 110.1914:30.022:25:01.0Pdiff
Wichita, Kansas 110.9714:33.422:25:04.4Pdiff
New York, New York 111.2614:34.722:25:05.7Pdiff
St. Louis, Missouri 111.8114:37.222:25:08.2Pdiff
Philadelphia, Pennsylvania 112.0314:38.122:25:09.1Pdiff
Washington, D.C. 113.0614:42.722:25:13.7Pdiff
Knoxville, Tennessee 115.3114:52.722:25:23.7Pdiff
Brownsville, Texas 121.8815:21.922:25:52.9Pdiff
Miami, Florida 125.9515:39.922:26:10.9Pdiff
Mexico City, Mexico 127.0715:44.922:26:15.9Pdiff
San Juan, Puerto Rico 132.6316:09.622:26:40.6Pdiff
Palmer Station, Antarctica 140.0316:42.422:27:13.4Pdiff
Lima, Peru 163.6920:04.322:30:35.3PKPdf

Travel Time Information and Calculator

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