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 20.33 4:36.322:01:00.3P
Wellington, New Zealand 31.33 6:20.522:02:44.5P
Agana, Guam 31.83 6:24.922:02:48.9P
Honolulu, Hawaii 48.10 8:39.822:05:03.8P
Tokyo, Japan 52.35 9:11.922:05:35.9P
Beijing, China 68.0310:59.622:07:23.6P
Anchorage, Alaska 79.9312:09.222:08:33.2P
San Francisco, California 82.7412:24.122:08:48.1P
Los Angeles, California 84.8012:34.622:08:58.6P
Seattle, Washington 86.2612:41.922:09:05.9P
Kathmandu, Nepal 86.5512:43.322:09:07.3P
Phoenix, Arizona 89.6212:57.922:09:21.9P
Palmer Station, Antarctica 93.9213:17.822:09:41.8P
Albuquerque, New Mexico 94.3613:19.822:09:43.8P
Golden, Colorado 96.2513:28.422:09:52.4P
Mexico City, Mexico 98.4313:38.122:10:02.1Pdiff
Brownsville, Texas 100.8213:48.722:10:12.8Pdiff
Wichita, Kansas 102.1413:54.622:10:18.6Pdiff
Duluth, Minnesota 106.2214:12.722:10:36.7Pdiff
St. Louis, Missouri 107.7414:19.522:10:43.5Pdiff
Knoxville, Tennessee 111.8514:37.722:11:01.7Pdiff
Lima, Peru 113.7214:46.022:11:10.0Pdiff
Miami, Florida 116.3914:57.822:11:21.8Pdiff
Ottawa, Canada 117.7315:03.822:11:27.8Pdiff
Washington, D.C. 118.0115:05.022:11:29.0Pdiff
Philadelphia, Pennsylvania 119.2615:10.622:11:34.6Pdiff
Moscow, Russia 119.7315:12.722:11:36.7Pdiff
New York, New York 119.9815:13.822:11:37.8Pdiff
Boston, Massachusetts 121.7315:21.622:11:45.6Pdiff
Bangor, Maine 122.6315:25.522:11:49.5Pdiff
Nairobi, Kenya 127.6415:47.822:12:11.8Pdiff
Bergen, Norway 128.4815:51.522:12:15.5Pdiff
San Juan, Puerto Rico 129.5315:56.222:12:20.2Pdiff
London, England 137.8716:33.222:12:57.2Pdiff
Rome, Italy 141.1716:47.822:13:11.8Pdiff

Travel Time Information and Calculator

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