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 20.68 4:37.918:15:24.9P
Wellington, New Zealand 31.36 6:18.418:17:05.4P
Agana, Guam 32.02 6:24.218:17:11.2P
Honolulu, Hawaii 47.70 8:34.218:19:21.2P
Tokyo, Japan 52.42 9:10.118:19:57.1P
Beijing, China 68.2010:58.118:21:45.1P
Anchorage, Alaska 79.6612:05.218:22:52.2P
San Francisco, California 82.3412:19.518:23:06.5P
Los Angeles, California 84.3912:30.018:23:17.0P
Seattle, Washington 85.8912:37.518:23:24.5P
Kathmandu, Nepal 86.8512:42.218:23:29.2P
Phoenix, Arizona 89.1912:53.318:23:40.3P
Palmer Station, Antarctica 93.9213:15.218:24:02.2P
Albuquerque, New Mexico 93.9413:15.318:24:02.3P
Golden, Colorado 95.8513:24.018:24:11.0P
Mexico City, Mexico 97.9913:33.618:24:20.6P
Brownsville, Texas 100.3913:44.218:24:31.2Pdiff
Wichita, Kansas 101.7213:50.118:24:37.1Pdiff
Duluth, Minnesota 105.8314:08.418:24:55.4Pdiff
St. Louis, Missouri 107.3314:15.018:25:02.0Pdiff
Knoxville, Tennessee 111.4314:33.318:25:20.2Pdiff
Lima, Peru 113.3614:41.818:25:28.8Pdiff
Miami, Florida 115.9514:53.318:25:40.3Pdiff
Ottawa, Canada 117.3414:59.518:25:46.5Pdiff
Washington, D.C. 117.6015:00.618:25:47.6Pdiff
Philadelphia, Pennsylvania 118.8615:06.218:25:53.2Pdiff
New York, New York 119.5815:09.418:25:56.4Pdiff
Moscow, Russia 119.8415:10.618:25:57.6Pdiff
Boston, Massachusetts 121.3415:17.218:26:04.2Pdiff
Bangor, Maine 122.2515:21.318:26:08.2Pdiff
Nairobi, Kenya 128.0815:47.118:26:34.1Pdiff
Bergen, Norway 128.4415:48.718:26:35.7Pdiff
San Juan, Puerto Rico 129.0915:51.618:26:38.6Pdiff
London, England 137.8416:30.518:27:17.5Pdiff
Rome, Italy 141.2816:45.818:27:32.8Pdiff

Travel Time Information and Calculator

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