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
Agana, Guam 17.81 4:00.921:42:25.9P
Brisbane, Australia 24.89 5:13.621:43:38.6P
Tokyo, Japan 39.95 7:24.521:45:49.5P
Wellington, New Zealand 46.48 8:17.121:46:42.1P
Beijing, China 50.39 8:47.121:47:12.1P
Honolulu, Hawaii 63.3210:18.521:48:43.5P
Kathmandu, Nepal 64.0410:23.321:48:48.3P
Anchorage, Alaska 83.0312:14.521:50:39.5P
San Francisco, California 96.2913:17.321:51:42.3P
Seattle, Washington 96.3713:17.721:51:42.6P
Los Angeles, California 99.7013:32.521:51:57.5Pdiff
Moscow, Russia 102.2013:43.521:52:08.5Pdiff
Phoenix, Arizona 104.8613:55.421:52:20.4Pdiff
Palmer Station, Antarctica 105.5313:58.421:52:23.4Pdiff
Nairobi, Kenya 106.0014:00.521:52:25.5Pdiff
Albuquerque, New Mexico 109.1614:14.421:52:39.4Pdiff
Golden, Colorado 109.5114:16.021:52:41.0Pdiff
Bergen, Norway 115.5914:43.021:53:08.0Pdiff
Wichita, Kansas 115.9514:44.621:53:09.6Pdiff
Duluth, Minnesota 116.5414:47.221:53:12.2Pdiff
Mexico City, Mexico 117.6914:52.321:53:17.3Pdiff
Brownsville, Texas 118.3814:55.421:53:20.4Pdiff
St. Louis, Missouri 120.9615:06.821:53:31.8Pdiff
Rome, Italy 122.2715:12.721:53:37.7Pdiff
London, England 123.9215:20.021:53:45.0Pdiff
Knoxville, Tennessee 125.7415:28.121:53:53.1Pdiff
Ottawa, Canada 127.0115:33.721:53:58.7Pdiff
Washington, D.C. 130.0415:47.121:54:12.1Pdiff
Philadelphia, Pennsylvania 130.6415:49.821:54:14.8Pdiff
New York, New York 130.9015:50.921:54:15.9Pdiff
Bangor, Maine 131.0715:51.721:54:16.7Pdiff
Boston, Massachusetts 131.5615:53.921:54:18.9Pdiff
Miami, Florida 133.5116:02.621:54:27.6Pdiff
Lima, Peru 136.9616:17.921:54:42.9Pdiff
San Juan, Puerto Rico 148.2819:31.821:57:56.8PKPdf

Travel Time Information and Calculator

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