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 20.56 4:33.222:15:44.2P
Brisbane, Australia 20.94 4:37.322:15:48.3P
Wellington, New Zealand 41.54 7:40.822:18:51.8P
Tokyo, Japan 43.11 7:53.622:19:04.6P
Beijing, China 55.12 9:25.322:20:36.3P
Honolulu, Hawaii 59.81 9:58.422:21:09.4P
Kathmandu, Nepal 69.8611:03.822:22:14.8P
Anchorage, Alaska 82.9612:17.922:23:28.9P
San Francisco, California 93.6013:08.822:24:19.8P
Seattle, Washington 94.6413:13.622:24:24.6P
Los Angeles, California 96.6713:22.722:24:33.8P
Phoenix, Arizona 101.7813:45.522:24:56.5Pdiff
Palmer Station, Antarctica 102.0313:46.622:24:57.6Pdiff
Albuquerque, New Mexico 106.2514:05.322:25:16.3Pdiff
Golden, Colorado 107.0614:08.922:25:19.9Pdiff
Moscow, Russia 107.2414:09.722:25:20.7Pdiff
Nairobi, Kenya 111.1614:27.122:25:38.1Pdiff
Wichita, Kansas 113.4114:37.122:25:48.1Pdiff
Mexico City, Mexico 113.4714:37.422:25:48.4Pdiff
Brownsville, Texas 114.7314:42.922:25:54.0Pdiff
Duluth, Minnesota 115.0414:44.322:25:55.3Pdiff
St. Louis, Missouri 118.6715:00.522:26:11.5Pdiff
Bergen, Norway 119.8515:05.722:26:16.7Pdiff
Knoxville, Tennessee 123.3215:21.122:26:32.1Pdiff
Ottawa, Canada 125.9915:33.022:26:44.0Pdiff
Rome, Italy 127.6815:40.522:26:51.5Pdiff
Washington, D.C. 128.2615:43.022:26:54.0Pdiff
London, England 128.5015:44.122:26:55.1Pdiff
Philadelphia, Pennsylvania 129.0715:46.622:26:57.6Pdiff
New York, New York 129.4715:48.422:26:59.4Pdiff
Miami, Florida 130.1615:51.522:27:02.5Pdiff
Bangor, Maine 130.3915:52.522:27:03.5Pdiff
Boston, Massachusetts 130.4815:52.922:27:03.9Pdiff
Lima, Peru 131.0915:55.622:27:06.6Pdiff
San Juan, Puerto Rico 144.5616:55.422:28:06.4Pdiff

Travel Time Information and Calculator

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