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 20.13 4:34.119:02:41.1P
Wellington, New Zealand 31.39 6:21.019:04:28.0P
Agana, Guam 31.63 6:23.119:04:30.1P
Honolulu, Hawaii 48.37 8:41.819:06:48.8P
Tokyo, Japan 52.21 9:11.019:07:18.0P
Beijing, China 67.8410:58.419:09:05.4P
Anchorage, Alaska 80.0612:09.919:10:16.9P
San Francisco, California 83.0112:25.519:10:32.5P
Los Angeles, California 85.0912:36.119:10:43.1P
Kathmandu, Nepal 86.2612:41.919:10:48.9P
Seattle, Washington 86.4912:43.019:10:50.0P
Phoenix, Arizona 89.9012:59.219:11:06.2P
Palmer Station, Antarctica 94.0013:18.119:11:25.1P
Albuquerque, New Mexico 94.6413:21.119:11:28.1P
Golden, Colorado 96.5313:29.619:11:36.6P
Mexico City, Mexico 98.7513:39.519:11:46.5Pdiff
Brownsville, Texas 101.1413:50.119:11:57.1Pdiff
Wichita, Kansas 102.4213:55.819:12:02.8Pdiff
Duluth, Minnesota 106.4714:13.819:12:20.8Pdiff
St. Louis, Missouri 108.0214:20.719:12:27.7Pdiff
Knoxville, Tennessee 112.1414:39.019:12:46.0Pdiff
Lima, Peru 114.0314:47.419:12:54.4Pdiff
Miami, Florida 116.7014:59.219:13:06.2Pdiff
Ottawa, Canada 117.9815:04.919:13:11.9Pdiff
Washington, D.C. 118.2915:06.319:13:13.3Pdiff
Philadelphia, Pennsylvania 119.5315:11.819:13:18.8Pdiff
Moscow, Russia 119.5815:12.019:13:19.0Pdiff
New York, New York 120.2515:15.019:13:22.0Pdiff
Boston, Massachusetts 121.9915:22.719:13:29.7Pdiff
Bangor, Maine 122.8715:26.619:13:33.6Pdiff
Nairobi, Kenya 127.3115:46.319:13:53.3Pdiff
Bergen, Norway 128.4215:51.319:13:58.3Pdiff
San Juan, Puerto Rico 129.8615:57.619:14:04.6Pdiff
London, England 137.8216:32.919:14:40.0Pdiff
Rome, Italy 141.0016:47.119:14:54.1Pdiff

Travel Time Information and Calculator

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