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 1.84 0:29.122:16:34.1Pn
Tokyo, Japan 24.01 5:09.822:21:14.8P
Beijing, China 37.00 7:04.422:23:09.4P
Brisbane, Australia 40.09 7:30.322:23:35.2P
Honolulu, Hawaii 56.41 9:36.022:25:41.0P
Kathmandu, Nepal 56.82 9:38.922:25:44.0P
Wellington, New Zealand 60.0610:01.622:26:06.6P
Anchorage, Alaska 68.3310:55.822:27:00.8P
Seattle, Washington 83.8912:24.222:28:29.2P
San Francisco, California 85.7612:33.622:28:38.6P
Moscow, Russia 89.2012:50.022:28:55.0P
Los Angeles, California 89.8912:53.322:28:58.3P
Phoenix, Arizona 95.0013:16.822:29:21.8P
Golden, Colorado 98.0513:30.522:29:35.5P
Albuquerque, New Mexico 98.7113:33.522:29:38.5Pdiff
Bergen, Norway 100.8113:42.822:29:47.8Pdiff
Duluth, Minnesota 103.1913:53.422:29:58.4Pdiff
Wichita, Kansas 104.4513:59.022:30:04.0Pdiff
Nairobi, Kenya 106.9314:09.922:30:14.9Pdiff
St. Louis, Missouri 108.8114:18.322:30:23.3Pdiff
Brownsville, Texas 109.5214:21.422:30:26.4Pdiff
London, England 109.6514:22.022:30:27.0Pdiff
Rome, Italy 110.3414:25.122:30:30.1Pdiff
Mexico City, Mexico 110.6014:26.222:30:31.2Pdiff
Ottawa, Canada 112.7614:35.822:30:40.8Pdiff
Knoxville, Tennessee 113.6914:40.022:30:45.0Pdiff
Bangor, Maine 116.3614:51.822:30:56.8Pdiff
Washington, D.C. 116.7514:53.522:30:58.5Pdiff
Philadelphia, Pennsylvania 117.0214:54.722:30:59.7Pdiff
New York, New York 117.0714:55.022:30:60.0Pdiff
Boston, Massachusetts 117.2814:55.922:31:00.9Pdiff
Palmer Station, Antarctica 121.1815:13.222:31:18.2Pdiff
Miami, Florida 123.1315:21.822:31:26.8Pdiff
San Juan, Puerto Rico 137.7716:26.922:32:31.9Pdiff
Lima, Peru 140.0016:36.822:32:41.8Pdiff

Travel Time Information and Calculator

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