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 23.59 5:10.915:19:40.9P
Brisbane, Australia 28.39 5:54.315:20:24.3P
Tokyo, Japan 42.81 7:57.715:22:27.7P
Beijing, China 48.77 8:44.815:23:14.8P
Wellington, New Zealand 50.94 9:01.315:23:31.3P
Kathmandu, Nepal 56.96 9:45.315:24:15.3P
Honolulu, Hawaii 73.8911:35.015:26:05.0P
Anchorage, Alaska 90.0412:59.815:27:29.8P
Nairobi, Kenya 95.3713:24.315:27:54.3P
Moscow, Russia 98.2213:37.115:28:07.1P
Palmer Station, Antarctica 104.6814:05.815:28:35.8Pdiff
Seattle, Washington 105.2814:08.415:28:38.4Pdiff
San Francisco, California 106.1414:12.315:28:42.3Pdiff
Los Angeles, California 109.8214:28.615:28:58.6Pdiff
Bergen, Norway 113.5514:45.115:29:15.1Pdiff
Phoenix, Arizona 115.0014:51.615:29:21.6Pdiff
Rome, Italy 116.6114:58.715:29:28.7Pdiff
Golden, Colorado 119.0415:09.515:29:39.5Pdiff
Albuquerque, New Mexico 119.1215:09.815:29:39.8Pdiff
London, England 120.7815:17.215:29:47.2Pdiff
Duluth, Minnesota 124.9015:35.515:30:05.5Pdiff
Wichita, Kansas 125.4915:38.215:30:08.2Pdiff
Mexico City, Mexico 128.4415:51.215:30:21.2Pdiff
Brownsville, Texas 128.8615:53.115:30:23.1Pdiff
St. Louis, Missouri 130.1815:59.015:30:28.9Pdiff
Ottawa, Canada 134.4816:18.015:30:48.0Pdiff
Knoxville, Tennessee 135.0416:20.515:30:50.5Pdiff
Bangor, Maine 137.9116:33.315:31:03.3Pdiff
Washington, D.C. 138.4716:35.815:31:05.8Pdiff
Philadelphia, Pennsylvania 138.7816:37.115:31:07.1Pdiff
New York, New York 138.8316:37.315:31:07.3Pdiff
Boston, Massachusetts 138.9816:38.015:31:08.0Pdiff
Miami, Florida 143.6616:58.815:31:28.8Pdiff
Lima, Peru 145.2219:36.515:34:06.5PKPbc
San Juan, Puerto Rico 158.5519:58.715:34:28.7PKPdf

Travel Time Information and Calculator

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