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 4:30.221:05:42.2P
Agana, Guam 31.34 6:17.121:07:29.1P
Wellington, New Zealand 31.58 6:19.221:07:31.2P
Honolulu, Hawaii 48.52 8:39.321:09:51.3P
Tokyo, Japan 51.97 9:05.521:10:17.5P
Beijing, China 67.5610:52.821:12:04.8P
Anchorage, Alaska 80.0612:06.021:13:18.0P
San Francisco, California 83.1712:22.421:13:34.4P
Los Angeles, California 85.2612:33.121:13:45.1P
Kathmandu, Nepal 85.9412:36.421:13:48.4P
Seattle, Washington 86.6012:39.721:13:51.7P
Phoenix, Arizona 90.0912:56.221:14:08.2P
Palmer Station, Antarctica 94.2013:15.221:14:27.2P
Albuquerque, New Mexico 94.8313:18.021:14:30.0P
Golden, Colorado 96.6913:26.421:14:38.4P
Mexico City, Mexico 99.0013:36.721:14:48.8Pdiff
Brownsville, Texas 101.3713:47.221:14:59.2Pdiff
Wichita, Kansas 102.5913:52.721:15:04.7Pdiff
Duluth, Minnesota 106.6014:10.521:15:22.5Pdiff
St. Louis, Missouri 108.1914:17.521:15:29.5Pdiff
Knoxville, Tennessee 112.3214:35.921:15:47.9Pdiff
Lima, Peru 114.3614:44.921:15:56.9Pdiff
Miami, Florida 116.9314:56.321:16:08.3Pdiff
Ottawa, Canada 118.1015:01.521:16:13.5Pdiff
Washington, D.C. 118.4515:03.121:16:15.1Pdiff
Moscow, Russia 119.3215:06.921:16:18.9Pdiff
Philadelphia, Pennsylvania 119.6915:08.621:16:20.6Pdiff
New York, New York 120.4015:11.721:16:23.7Pdiff
Boston, Massachusetts 122.1315:19.421:16:31.4Pdiff
Bangor, Maine 123.0015:23.221:16:35.2Pdiff
Nairobi, Kenya 127.0315:41.221:16:53.1Pdiff
Bergen, Norway 128.2415:46.521:16:58.5Pdiff
San Juan, Puerto Rico 130.1215:54.921:17:06.9Pdiff
London, England 137.6316:28.221:17:40.2Pdiff
Rome, Italy 140.7416:42.021:17:54.0Pdiff

Travel Time Information and Calculator

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