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
Anchorage, Alaska 2.99 0:45.723:28:09.7Pn
Seattle, Washington 21.66 4:42.123:32:06.1P
San Francisco, California 29.31 5:52.723:33:16.7P
Los Angeles, California 34.27 6:36.123:34:00.1P
Golden, Colorado 36.04 6:51.223:34:15.2P
Phoenix, Arizona 37.61 7:04.523:34:28.5P
Honolulu, Hawaii 37.73 7:05.523:34:29.5P
Duluth, Minnesota 37.82 7:06.223:34:30.2P
Albuquerque, New Mexico 38.93 7:15.523:34:39.5P
Wichita, Kansas 41.57 7:37.423:35:01.4P
St. Louis, Missouri 44.56 8:01.423:35:25.4P
Ottawa, Canada 46.98 8:20.523:35:44.5P
Tokyo, Japan 48.29 8:30.623:35:54.6P
Knoxville, Tennessee 49.25 8:37.923:36:01.9P
Bangor, Maine 50.78 8:49.523:36:13.5P
Brownsville, Texas 50.94 8:50.723:36:14.7P
Washington, D.C. 51.17 8:52.423:36:16.4P
New York, New York 51.30 8:53.423:36:17.4P
Philadelphia, Pennsylvania 51.30 8:53.423:36:17.4P
Boston, Massachusetts 51.52 8:55.023:36:19.0P
Mexico City, Mexico 55.58 9:24.723:36:48.7P
Beijing, China 56.73 9:32.823:36:56.8P
Bergen, Norway 59.88 9:54.823:37:18.8P
Miami, Florida 59.93 9:55.123:37:19.1P
Agana, Guam 63.9510:22.123:37:46.1P
Moscow, Russia 65.2610:30.623:37:54.6P
London, England 67.8310:47.023:38:11.0P
San Juan, Puerto Rico 73.2011:19.623:38:43.6P
Rome, Italy 78.8711:51.823:39:15.8P
Kathmandu, Nepal 80.7912:02.223:39:26.2P
Lima, Peru 93.5813:04.323:40:28.3P
Brisbane, Australia 96.7113:18.523:40:42.5P
Wellington, New Zealand 103.2313:47.523:41:11.5Pdiff
Nairobi, Kenya 121.8615:10.223:42:34.2Pdiff
Palmer Station, Antarctica 142.2216:40.623:44:04.6Pdiff

Travel Time Information and Calculator

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