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 1.70 0:27.217:17:46.2Pn
Miami, Florida 16.38 3:47.017:21:06.0Pn
Washington, D.C. 23.18 5:03.317:22:22.3P
Philadelphia, Pennsylvania 23.39 5:05.517:22:24.4P
New York, New York 23.70 5:08.317:22:27.3P
Boston, Massachusetts 24.50 5:15.617:22:34.6P
Knoxville, Tennessee 25.35 5:23.417:22:42.4P
Bangor, Maine 26.54 5:34.117:22:53.1P
Ottawa, Canada 28.52 5:51.817:23:10.8P
St. Louis, Missouri 30.22 6:06.917:23:25.9P
Brownsville, Texas 31.53 6:18.417:23:37.4P
Lima, Peru 32.83 6:29.817:23:48.8P
Mexico City, Mexico 32.93 6:30.717:23:49.7P
Wichita, Kansas 34.64 6:45.517:24:04.5P
Duluth, Minnesota 36.34 7:00.117:24:19.1P
Albuquerque, New Mexico 40.91 7:38.417:24:57.4P
Golden, Colorado 41.08 7:39.817:24:58.8P
Phoenix, Arizona 45.07 8:12.017:25:31.0P
Los Angeles, California 50.24 8:52.217:26:11.2P
San Francisco, California 53.88 9:19.217:26:38.2P
Seattle, Washington 55.14 9:28.417:26:47.4P
London, England 59.7410:00.917:27:19.9P
Bergen, Norway 64.1110:30.217:27:49.2P
Rome, Italy 68.2610:56.917:28:15.9P
Anchorage, Alaska 71.9011:19.217:28:38.2P
Moscow, Russia 81.5312:13.617:29:32.6P
Palmer Station, Antarctica 85.9612:36.217:29:55.2P
Honolulu, Hawaii 86.5812:39.217:29:58.2P
Nairobi, Kenya 101.0013:45.317:31:04.3Pdiff
Tokyo, Japan 121.5515:16.517:32:35.5Pdiff
Beijing, China 121.9515:18.317:32:37.3Pdiff
Wellington, New Zealand 125.0115:31.917:32:50.9Pdiff
Kathmandu, Nepal 125.5315:34.217:32:53.2Pdiff
Agana, Guam 137.2516:26.217:33:45.2Pdiff
Brisbane, Australia 144.5716:58.717:34:17.7Pdiff

Travel Time Information and Calculator

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