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
Kathmandu, Nepal 21.80 4:48.918:20:57.9P
Beijing, China 38.03 7:14.718:23:23.7P
Agana, Guam 50.10 8:51.418:25:00.4P
Tokyo, Japan 50.27 8:52.718:25:01.7P
Nairobi, Kenya 57.78 9:47.518:25:56.5P
Moscow, Russia 65.3910:38.918:26:47.9P
Brisbane, Australia 66.6710:47.218:26:56.2P
Rome, Italy 78.8311:59.418:28:08.4P
Bergen, Norway 82.9812:21.518:28:30.5P
London, England 86.8912:41.118:28:50.1P
Wellington, New Zealand 87.9112:46.018:28:55.0P
Anchorage, Alaska 95.6213:21.618:29:30.6P
Honolulu, Hawaii 103.9013:58.518:30:07.5Pdiff
Seattle, Washington 116.3014:53.518:31:02.5Pdiff
Palmer Station, Antarctica 117.9815:01.018:31:10.0Pdiff
San Francisco, California 123.5815:25.918:31:34.9Pdiff
Bangor, Maine 125.7615:35.518:31:44.5Pdiff
Duluth, Minnesota 125.7715:35.618:31:44.6Pdiff
Ottawa, Canada 126.6015:39.318:31:48.3Pdiff
Los Angeles, California 128.6115:48.218:31:57.2Pdiff
Boston, Massachusetts 128.6615:48.418:31:57.4Pdiff
Golden, Colorado 129.7715:53.318:32:02.3Pdiff
New York, New York 130.8515:58.118:32:07.1Pdiff
Philadelphia, Pennsylvania 131.8216:02.418:32:11.4Pdiff
Phoenix, Arizona 132.3516:04.818:32:13.8Pdiff
Washington, D.C. 133.1816:08.518:32:17.5Pdiff
Albuquerque, New Mexico 133.4016:09.518:32:18.5Pdiff
Wichita, Kansas 133.7916:11.218:32:20.2Pdiff
St. Louis, Missouri 133.9616:11.918:32:20.9Pdiff
Knoxville, Tennessee 136.8416:24.718:32:33.7Pdiff
Brownsville, Texas 145.0017:00.918:33:09.9Pdiff
Miami, Florida 146.5319:36.518:35:45.5PKPdf
San Juan, Puerto Rico 147.6919:38.518:35:47.5PKPdf
Mexico City, Mexico 150.2919:42.818:35:51.8PKPdf
Lima, Peru 170.1320:05.718:36:14.7PKPdf

Travel Time Information and Calculator

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