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
Tokyo, Japan 6.55 1:33.723:05:51.7Pn
Agana, Guam 16.02 3:41.923:07:59.9Pn
Beijing, China 23.32 5:03.823:09:21.8P
Kathmandu, Nepal 49.24 8:43.523:13:01.5P
Anchorage, Alaska 54.36 9:21.623:13:39.6P
Honolulu, Hawaii 54.64 9:23.723:13:41.7P
Brisbane, Australia 57.51 9:44.223:14:02.2P
Seattle, Washington 72.5711:22.023:15:40.0P
Moscow, Russia 73.6411:28.423:15:46.4P
Wellington, New Zealand 76.5911:45.323:16:03.3P
San Francisco, California 76.8511:46.823:16:04.8P
Los Angeles, California 81.5912:12.723:16:30.7P
Bergen, Norway 83.7812:24.023:16:42.0P
Phoenix, Arizona 86.3012:36.623:16:54.6P
Golden, Colorado 87.2912:41.423:16:59.4P
Albuquerque, New Mexico 89.1112:50.023:17:08.0P
Duluth, Minnesota 89.9712:54.023:17:12.0P
London, England 92.8513:07.323:17:25.3P
Wichita, Kansas 93.3213:09.523:17:27.5P
Rome, Italy 95.1113:17.723:17:35.7P
St. Louis, Missouri 96.7313:25.023:17:43.0P
Ottawa, Canada 98.1713:31.423:17:49.4P
Brownsville, Texas 100.9513:43.823:18:01.8Pdiff
Bangor, Maine 101.1413:44.623:18:02.6Pdiff
Knoxville, Tennessee 101.4713:46.123:18:04.1Pdiff
Boston, Massachusetts 102.5313:50.823:18:08.8Pdiff
New York, New York 102.8113:52.123:18:10.1Pdiff
Philadelphia, Pennsylvania 102.9913:52.823:18:10.8Pdiff
Washington, D.C. 103.0713:53.223:18:11.2Pdiff
Nairobi, Kenya 103.6713:55.823:18:13.8Pdiff
Mexico City, Mexico 103.8313:56.623:18:14.5Pdiff
Miami, Florida 112.0114:32.923:18:50.9Pdiff
San Juan, Puerto Rico 125.3615:32.123:19:50.1Pdiff
Palmer Station, Antarctica 138.5616:30.723:20:48.7Pdiff
Lima, Peru 140.0516:37.423:20:55.4Pdiff

Travel Time Information and Calculator

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