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 20.61 4:37.319:13:48.3P
Wellington, New Zealand 31.26 6:17.719:15:28.7P
Agana, Guam 32.11 6:25.119:15:36.1P
Honolulu, Hawaii 47.75 8:34.719:17:45.7P
Tokyo, Japan 52.52 9:11.019:18:22.0P
Beijing, China 68.3010:58.919:20:09.9P
Anchorage, Alaska 79.7412:05.819:21:16.8P
San Francisco, California 82.3812:19.819:21:30.8P
Los Angeles, California 84.4212:30.319:21:41.3P
Seattle, Washington 85.9512:38.019:21:49.0P
Kathmandu, Nepal 86.9312:42.719:21:53.7P
Phoenix, Arizona 89.2212:53.619:22:04.6P
Palmer Station, Antarctica 93.8213:14.919:22:25.9P
Albuquerque, New Mexico 93.9713:15.619:22:26.6P
Golden, Colorado 95.8913:24.319:22:35.3P
Mexico City, Mexico 97.9913:33.719:22:44.7P
Brownsville, Texas 100.4013:44.419:22:55.5Pdiff
Wichita, Kansas 101.7513:50.519:23:01.5Pdiff
Duluth, Minnesota 105.8914:08.819:23:19.8Pdiff
St. Louis, Missouri 107.3614:15.419:23:26.4Pdiff
Knoxville, Tennessee 111.4614:33.619:23:44.6Pdiff
Lima, Peru 113.3014:41.719:23:52.7Pdiff
Miami, Florida 115.9614:53.519:24:04.5Pdiff
Ottawa, Canada 117.3914:59.919:24:10.9Pdiff
Washington, D.C. 117.6415:01.019:24:12.0Pdiff
Philadelphia, Pennsylvania 118.9015:06.519:24:17.5Pdiff
New York, New York 119.6215:09.819:24:20.8Pdiff
Moscow, Russia 119.9415:11.219:24:22.2Pdiff
Boston, Massachusetts 121.3815:17.619:24:28.6Pdiff
Bangor, Maine 122.3015:21.619:24:32.6Pdiff
Nairobi, Kenya 128.0915:47.419:24:58.4Pdiff
Bergen, Norway 128.5415:49.419:25:00.4Pdiff
San Juan, Puerto Rico 129.0815:51.819:25:02.8Pdiff
London, England 137.9516:31.119:25:42.1Pdiff
Rome, Italy 141.3816:46.419:25:57.4Pdiff

Travel Time Information and Calculator

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