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 20.38 4:29.822:56:25.8P
Brisbane, Australia 21.12 4:37.822:56:33.9P
Wellington, New Zealand 41.72 7:40.422:59:36.4P
Tokyo, Japan 42.93 7:50.322:59:46.3P
Beijing, China 54.93 9:22.023:01:18.0P
Honolulu, Hawaii 59.79 9:56.223:01:52.2P
Kathmandu, Nepal 69.7011:00.723:02:56.7P
Anchorage, Alaska 82.8412:15.123:04:11.1P
San Francisco, California 93.5613:06.523:05:02.5P
Seattle, Washington 94.5713:11.123:05:07.1P
Los Angeles, California 96.6413:20.423:05:16.4P
Phoenix, Arizona 101.7613:43.223:05:39.2Pdiff
Palmer Station, Antarctica 102.2113:45.223:05:41.2Pdiff
Albuquerque, New Mexico 106.2214:03.023:05:59.0Pdiff
Golden, Colorado 107.0114:06.523:06:02.5Pdiff
Moscow, Russia 107.0614:06.723:06:02.7Pdiff
Nairobi, Kenya 111.0914:24.623:06:20.6Pdiff
Wichita, Kansas 113.3714:34.723:06:30.7Pdiff
Mexico City, Mexico 113.5014:35.323:06:31.3Pdiff
Brownsville, Texas 114.7314:40.723:06:36.8Pdiff
Duluth, Minnesota 114.9614:41.823:06:37.8Pdiff
St. Louis, Missouri 118.6214:58.023:06:54.0Pdiff
Bergen, Norway 119.6615:02.723:06:58.7Pdiff
Knoxville, Tennessee 123.2715:18.723:07:14.7Pdiff
Ottawa, Canada 125.9115:30.423:07:26.4Pdiff
Rome, Italy 127.5015:37.523:07:33.5Pdiff
Washington, D.C. 128.2015:40.623:07:36.6Pdiff
London, England 128.3115:41.123:07:37.1Pdiff
Philadelphia, Pennsylvania 129.0015:44.123:07:40.1Pdiff
New York, New York 129.4015:45.923:07:41.9Pdiff
Miami, Florida 130.1515:49.223:07:45.2Pdiff
Bangor, Maine 130.2915:49.823:07:45.8Pdiff
Boston, Massachusetts 130.3915:50.323:07:46.3Pdiff
Lima, Peru 131.2315:54.023:07:50.0Pdiff
San Juan, Puerto Rico 144.5616:53.223:08:49.2Pdiff

Travel Time Information and Calculator

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