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
Brisbane, Australia 20.83 4:38.623:21:08.6P
Wellington, New Zealand 30.94 6:13.523:22:43.5P
Agana, Guam 32.68 6:28.923:22:58.9P
Honolulu, Hawaii 47.40 8:30.723:25:00.7P
Tokyo, Japan 52.99 9:13.123:25:43.1P
Beijing, China 68.8511:01.023:27:31.0P
Anchorage, Alaska 79.7012:04.223:28:34.2P
San Francisco, California 82.0112:16.523:28:46.5P
Los Angeles, California 84.0112:26.823:28:56.8P
Seattle, Washington 85.6812:35.223:29:05.2P
Kathmandu, Nepal 87.5912:44.523:29:14.5P
Phoenix, Arizona 88.7912:50.223:29:20.2P
Palmer Station, Antarctica 93.4513:11.823:29:41.8P
Albuquerque, New Mexico 93.5513:12.223:29:42.2P
Golden, Colorado 95.5013:21.123:29:51.1P
Mexico City, Mexico 97.4313:29.823:29:59.8P
Brownsville, Texas 99.8913:40.723:30:10.7Pdiff
Wichita, Kansas 101.3413:47.223:30:17.2Pdiff
Duluth, Minnesota 105.5714:05.923:30:35.9Pdiff
St. Louis, Missouri 106.9614:12.123:30:42.1Pdiff
Knoxville, Tennessee 111.0414:30.223:31:00.2Pdiff
Lima, Peru 112.6314:37.323:31:07.3Pdiff
Miami, Florida 115.4414:49.823:31:19.8Pdiff
Ottawa, Canada 117.0714:57.023:31:27.0Pdiff
Washington, D.C. 117.2514:57.823:31:27.8Pdiff
Philadelphia, Pennsylvania 118.5215:03.423:31:33.4Pdiff
New York, New York 119.2515:06.723:31:36.7Pdiff
Moscow, Russia 120.4315:11.923:31:41.9Pdiff
Boston, Massachusetts 121.0415:14.623:31:44.6Pdiff
Bangor, Maine 121.9915:18.823:31:48.8Pdiff
San Juan, Puerto Rico 128.5115:47.823:32:17.8Pdiff
Nairobi, Kenya 128.6915:48.623:32:18.6Pdiff
Bergen, Norway 128.8615:49.323:32:19.3Pdiff
London, England 138.2716:31.123:33:01.1Pdiff
Rome, Italy 141.8916:47.223:33:17.2Pdiff

Travel Time Information and Calculator

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