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 19.73 4:26.020:47:44.0P
Agana, Guam 31.38 6:16.820:49:34.8P
Wellington, New Zealand 31.40 6:16.920:49:34.9P
Honolulu, Hawaii 48.86 8:41.220:51:59.2P
Tokyo, Japan 52.09 9:05.720:52:23.7P
Beijing, China 67.6110:52.320:54:10.3P
Anchorage, Alaska 80.3712:06.920:55:24.9P
San Francisco, California 83.5112:23.420:55:41.4P
Los Angeles, California 85.6012:33.920:55:51.9P
Kathmandu, Nepal 85.8512:35.220:55:53.2P
Seattle, Washington 86.9412:40.520:55:58.5P
Phoenix, Arizona 90.4212:56.920:56:14.9P
Palmer Station, Antarctica 94.0313:13.620:56:31.6P
Albuquerque, New Mexico 95.1613:18.720:56:36.7P
Golden, Colorado 97.0313:27.120:56:45.1P
Mexico City, Mexico 99.3013:37.320:56:55.3Pdiff
Brownsville, Texas 101.6813:47.820:57:05.8Pdiff
Wichita, Kansas 102.9313:53.420:57:11.4Pdiff
Duluth, Minnesota 106.9414:11.220:57:29.2Pdiff
St. Louis, Missouri 108.5314:18.220:57:36.2Pdiff
Knoxville, Tennessee 112.6614:36.620:57:54.6Pdiff
Lima, Peru 114.5014:44.720:58:02.7Pdiff
Miami, Florida 117.2514:56.920:58:14.9Pdiff
Ottawa, Canada 118.4515:02.220:58:20.2Pdiff
Washington, D.C. 118.7915:03.820:58:21.8Pdiff
Moscow, Russia 119.4115:06.520:58:24.5Pdiff
Philadelphia, Pennsylvania 120.0315:09.320:58:27.3Pdiff
New York, New York 120.7415:12.420:58:30.4Pdiff
Boston, Massachusetts 122.4715:20.120:58:38.1Pdiff
Bangor, Maine 123.3415:24.020:58:42.0Pdiff
Nairobi, Kenya 126.7515:39.120:58:57.1Pdiff
Bergen, Norway 128.4315:46.620:59:04.6Pdiff
San Juan, Puerto Rico 130.4115:55.420:59:13.4Pdiff
London, England 137.8116:28.220:59:46.2Pdiff
Rome, Italy 140.8116:41.520:59:59.5Pdiff

Travel Time Information and Calculator

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