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 6.87 1:43.523:50:12.5P
Agana, Guam 16.01 3:21.623:51:50.6P
Beijing, China 21.96 4:18.523:52:47.5P
Kathmandu, Nepal 47.36 7:51.023:56:20.0P
Anchorage, Alaska 55.95 8:53.423:57:22.4P
Honolulu, Hawaii 56.74 8:58.923:57:27.9P
Brisbane, Australia 57.44 9:03.723:57:32.7P
Moscow, Russia 72.9110:41.523:59:10.5P
Seattle, Washington 74.4010:50.023:59:19.0P
Wellington, New Zealand 76.9911:04.423:59:33.4P
San Francisco, California 78.8311:14.423:59:43.4P
Bergen, Norway 83.5711:38.9 0:00:07.9P
Los Angeles, California 83.5911:39.0 0:00:08.0P
Phoenix, Arizona 88.2712:01.4 0:00:30.4P
Golden, Colorado 89.1212:05.4 0:00:34.4P
Albuquerque, New Mexico 91.0212:14.2 0:00:43.2P
Duluth, Minnesota 91.5512:16.6 0:00:45.6P
London, England 92.5412:21.1 0:00:50.1P
Rome, Italy 94.3412:29.3 0:00:58.3P
Wichita, Kansas 95.1112:32.8 0:01:01.8P
St. Louis, Missouri 98.4212:47.5 0:01:16.5Pdiff
Ottawa, Canada 99.5312:52.4 0:01:21.5Pdiff
Nairobi, Kenya 101.6813:02.0 0:01:31.0Pdiff
Bangor, Maine 102.3813:05.1 0:01:34.1Pdiff
Brownsville, Texas 102.8913:07.4 0:01:36.4Pdiff
Knoxville, Tennessee 103.1313:08.4 0:01:37.4Pdiff
Boston, Massachusetts 103.8513:11.6 0:01:40.6Pdiff
New York, New York 104.2213:13.3 0:01:42.3Pdiff
Philadelphia, Pennsylvania 104.4213:14.2 0:01:43.2Pdiff
Washington, D.C. 104.5513:14.8 0:01:43.8Pdiff
Mexico City, Mexico 105.8513:20.5 0:01:49.5Pdiff
Miami, Florida 113.7413:55.5 0:02:24.5Pdiff
San Juan, Puerto Rico 126.9114:54.0 0:03:23.0Pdiff
Palmer Station, Antarctica 138.5215:45.5 0:04:14.5Pdiff
Lima, Peru 142.1716:01.7 0:04:30.7Pdiff

Travel Time Information and Calculator

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