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 20.41 4:37.120:49:55.1P
Wellington, New Zealand 31.27 6:20.020:51:38.0P
Agana, Guam 31.96 6:26.020:51:44.0P
Honolulu, Hawaii 47.99 8:38.920:53:56.9P
Tokyo, Japan 52.44 9:12.620:54:30.6P
Beijing, China 68.1611:00.320:56:18.3P
Anchorage, Alaska 79.8912:09.020:57:27.0P
San Francisco, California 82.6312:23.520:57:41.5P
Los Angeles, California 84.6812:34.020:57:52.0P
Seattle, Washington 86.1712:41.420:57:59.4P
Kathmandu, Nepal 86.7012:44.020:58:02.0P
Phoenix, Arizona 89.4912:57.320:58:15.3P
Palmer Station, Antarctica 93.8613:17.520:58:35.5P
Albuquerque, New Mexico 94.2313:19.220:58:37.2P
Golden, Colorado 96.1413:27.920:58:45.9P
Mexico City, Mexico 98.2813:37.420:58:55.4P
Brownsville, Texas 100.6813:48.120:59:06.1Pdiff
Wichita, Kansas 102.0113:54.020:59:12.0Pdiff
Duluth, Minnesota 106.1214:12.320:59:30.3Pdiff
St. Louis, Missouri 107.6214:18.920:59:36.9Pdiff
Knoxville, Tennessee 111.7314:37.120:59:55.1Pdiff
Lima, Peru 113.5614:45.321:00:03.3Pdiff
Miami, Florida 116.2414:57.221:00:15.2Pdiff
Ottawa, Canada 117.6315:03.321:00:21.3Pdiff
Washington, D.C. 117.8915:04.521:00:22.5Pdiff
Philadelphia, Pennsylvania 119.1515:10.121:00:28.1Pdiff
Moscow, Russia 119.8415:13.121:00:31.1Pdiff
New York, New York 119.8715:13.321:00:31.3Pdiff
Boston, Massachusetts 121.6315:21.121:00:39.1Pdiff
Bangor, Maine 122.5315:25.121:00:43.1Pdiff
Nairobi, Kenya 127.8015:48.521:01:06.5Pdiff
Bergen, Norway 128.5315:51.721:01:09.7Pdiff
San Juan, Puerto Rico 129.3715:55.521:01:13.5Pdiff
London, England 137.9316:33.521:01:51.5Pdiff
Rome, Italy 141.2716:48.321:02:06.3Pdiff

Travel Time Information and Calculator

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