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
Lima, Peru 31.23 6:19.6 0:41:02.6P
Palmer Station, Antarctica 37.81 7:16.4 0:41:59.4P
Mexico City, Mexico 54.92 9:30.8 0:44:13.8P
Brownsville, Texas 61.4010:16.2 0:44:59.2P
San Juan, Puerto Rico 62.6510:24.6 0:45:07.6P
Miami, Florida 63.9510:33.3 0:45:16.3P
Wellington, New Zealand 64.5010:36.9 0:45:19.9P
Phoenix, Arizona 69.8611:10.9 0:45:53.9P
Albuquerque, New Mexico 70.8211:16.8 0:45:59.8P
Los Angeles, California 71.6211:21.7 0:46:04.7P
Knoxville, Tennessee 72.6511:27.9 0:46:10.9P
Wichita, Kansas 73.2311:31.3 0:46:14.3P
St. Louis, Missouri 74.6111:39.4 0:46:22.4P
Golden, Colorado 75.3511:43.6 0:46:26.6P
San Francisco, California 76.1811:48.4 0:46:31.4P
Washington, D.C. 77.2111:54.2 0:46:37.2P
Philadelphia, Pennsylvania 78.6912:02.4 0:46:45.4P
Honolulu, Hawaii 79.0812:04.6 0:46:47.6P
New York, New York 79.7212:08.0 0:46:51.0P
Boston, Massachusetts 82.0412:20.4 0:47:03.4P
Duluth, Minnesota 82.4512:22.6 0:47:05.6P
Ottawa, Canada 83.7012:29.0 0:47:12.0P
Bangor, Maine 84.9812:35.5 0:47:18.5P
Seattle, Washington 85.6612:38.9 0:47:21.9P
Brisbane, Australia 86.9912:45.4 0:47:28.4P
Anchorage, Alaska 104.9514:07.0 0:48:50.0Pdiff
Agana, Guam 118.4315:06.9 0:49:49.9Pdiff
London, England 122.5915:25.4 0:50:08.4Pdiff
Nairobi, Kenya 125.2215:37.0 0:50:20.0Pdiff
Bergen, Norway 127.5915:47.6 0:50:30.6Pdiff
Rome, Italy 128.0615:49.7 0:50:32.7Pdiff
Tokyo, Japan 132.4316:09.1 0:50:52.1Pdiff
Moscow, Russia 144.9517:04.6 0:51:47.6Pdiff
Beijing, China 151.3219:48.5 0:54:31.5PKPdf
Kathmandu, Nepal 170.8720:10.2 0:54:53.2PKPdf

Travel Time Information and Calculator

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