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
San Juan, Puerto Rico 1.24 0:22.415:48:24.4Pn
Miami, Florida 15.13 3:28.815:51:30.8Pn
Washington, D.C. 21.91 4:45.815:52:47.8P
Philadelphia, Pennsylvania 22.15 4:48.415:52:50.4P
New York, New York 22.49 4:52.015:52:54.0P
Boston, Massachusetts 23.35 5:00.415:53:02.4P
Knoxville, Tennessee 24.02 5:06.515:53:08.5P
Bangor, Maine 25.46 5:19.615:53:21.6P
Ottawa, Canada 27.32 5:36.315:53:38.3P
St. Louis, Missouri 28.90 5:50.415:53:52.4P
Brownsville, Texas 30.37 6:03.415:54:05.4P
Mexico City, Mexico 31.93 6:17.115:54:19.1P
Wichita, Kansas 33.32 6:29.215:54:31.2P
Lima, Peru 33.40 6:29.915:54:31.9P
Duluth, Minnesota 35.03 6:43.915:54:45.9P
Albuquerque, New Mexico 39.63 7:22.815:55:24.8P
Golden, Colorado 39.77 7:23.915:55:25.9P
Phoenix, Arizona 43.81 7:56.915:55:58.9P
Los Angeles, California 48.99 8:37.315:56:39.4P
San Francisco, California 52.59 9:04.415:57:06.4P
Seattle, Washington 53.82 9:13.415:57:15.4P
London, England 59.58 9:54.315:57:56.3P
Bergen, Norway 63.7310:22.215:58:24.2P
Rome, Italy 68.3410:51.815:58:53.8P
Anchorage, Alaska 70.6011:05.715:59:07.7P
Moscow, Russia 81.2112:06.016:00:08.0P
Honolulu, Hawaii 85.4012:27.516:00:29.5P
Palmer Station, Antarctica 86.9512:35.116:00:37.1P
Nairobi, Kenya 101.8513:43.016:01:45.0Pdiff
Tokyo, Japan 120.3015:04.916:03:06.9Pdiff
Beijing, China 120.9515:07.816:03:09.8Pdiff
Wellington, New Zealand 124.9115:25.416:03:27.4Pdiff
Kathmandu, Nepal 125.1815:26.616:03:28.6Pdiff
Agana, Guam 135.9216:14.316:04:16.3Pdiff
Brisbane, Australia 144.0916:50.516:04:52.5Pdiff

Travel Time Information and Calculator

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