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
Agana, Guam 20.03 4:22.812:18:00.8P
Brisbane, Australia 21.59 4:39.512:18:17.5P
Wellington, New Zealand 42.54 7:42.712:21:20.8P
Tokyo, Japan 42.56 7:42.912:21:20.9P
Beijing, China 54.15 9:11.812:22:49.8P
Honolulu, Hawaii 60.85 9:58.812:23:36.8P
Kathmandu, Nepal 68.5210:48.612:24:26.6P
Anchorage, Alaska 83.2512:12.212:25:50.2P
San Francisco, California 94.5013:05.712:26:43.7P
Seattle, Washington 95.3313:09.512:26:47.5P
Los Angeles, California 97.6313:19.812:26:57.8P
Palmer Station, Antarctica 102.6413:42.112:27:20.1Pdiff
Phoenix, Arizona 102.7613:42.612:27:20.6Pdiff
Moscow, Russia 106.1913:57.812:27:35.8Pdiff
Albuquerque, New Mexico 107.2014:02.312:27:40.3Pdiff
Golden, Colorado 107.9114:05.412:27:43.4Pdiff
Nairobi, Kenya 109.8014:13.812:27:51.8Pdiff
Wichita, Kansas 114.2914:33.712:28:11.8Pdiff
Mexico City, Mexico 114.6814:35.512:28:13.5Pdiff
Duluth, Minnesota 115.6914:40.012:28:18.0Pdiff
Brownsville, Texas 115.8314:40.612:28:18.6Pdiff
Bergen, Norway 119.0514:54.912:28:32.9Pdiff
St. Louis, Missouri 119.5014:56.912:28:34.9Pdiff
Knoxville, Tennessee 124.1815:17.712:28:55.7Pdiff
Rome, Italy 126.5215:28.012:29:06.0Pdiff
Ottawa, Canada 126.5515:28.212:29:06.2Pdiff
London, England 127.6115:32.912:29:10.9Pdiff
Washington, D.C. 128.9915:39.012:29:17.0Pdiff
Philadelphia, Pennsylvania 129.7615:42.412:29:20.4Pdiff
New York, New York 130.1315:44.112:29:22.1Pdiff
Bangor, Maine 130.8715:47.412:29:25.4Pdiff
Boston, Massachusetts 131.0615:48.212:29:26.2Pdiff
Miami, Florida 131.2215:48.912:29:26.9Pdiff
Lima, Peru 132.5015:54.612:29:32.6Pdiff
San Juan, Puerto Rico 145.7019:23.012:33:01.0PKPbc

Travel Time Information and Calculator

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