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 20.07 4:30.323:29:42.3P
Agana, Guam 31.12 6:15.123:31:27.1P
Wellington, New Zealand 31.75 6:20.723:31:32.7P
Honolulu, Hawaii 48.58 8:39.823:33:51.8P
Tokyo, Japan 51.77 9:04.023:34:16.0P
Beijing, China 67.3310:51.423:36:03.4P
Anchorage, Alaska 80.0012:05.823:37:17.8P
San Francisco, California 83.2312:22.823:37:34.8P
Los Angeles, California 85.3512:33.523:37:45.5P
Kathmandu, Nepal 85.7112:35.323:37:47.3P
Seattle, Washington 86.6312:39.823:37:51.8P
Phoenix, Arizona 90.1812:56.723:38:08.7P
Palmer Station, Antarctica 94.3813:16.023:38:28.0P
Albuquerque, New Mexico 94.9113:18.423:38:30.4P
Golden, Colorado 96.7613:26.823:38:38.8P
Mexico City, Mexico 99.1513:37.423:38:49.4Pdiff
Brownsville, Texas 101.4913:47.823:38:59.8Pdiff
Wichita, Kansas 102.6713:53.123:39:05.1Pdiff
Duluth, Minnesota 106.6414:10.723:39:22.7Pdiff
St. Louis, Missouri 108.2714:17.923:39:29.9Pdiff
Knoxville, Tennessee 112.4114:36.323:39:48.3Pdiff
Lima, Peru 114.5914:46.023:39:58.0Pdiff
Miami, Florida 117.0614:57.023:40:09.0Pdiff
Ottawa, Canada 118.1515:01.823:40:13.8Pdiff
Washington, D.C. 118.5315:03.423:40:15.4Pdiff
Moscow, Russia 119.1115:06.023:40:18.0Pdiff
Philadelphia, Pennsylvania 119.7615:08.923:40:20.9Pdiff
New York, New York 120.4615:12.023:40:24.0Pdiff
Boston, Massachusetts 122.1815:19.723:40:31.7Pdiff
Bangor, Maine 123.0415:23.523:40:35.5Pdiff
Nairobi, Kenya 126.8615:40.423:40:52.4Pdiff
Bergen, Norway 128.0715:45.823:40:57.8Pdiff
San Juan, Puerto Rico 130.2815:55.623:41:07.6Pdiff
London, England 137.4616:27.523:41:39.5Pdiff
Rome, Italy 140.5216:41.123:41:53.1Pdiff

Travel Time Information and Calculator

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