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 19.54 4:27.622:12:06.6P
Wellington, New Zealand 30.02 6:08.922:13:48.0P
Agana, Guam 33.04 6:35.422:14:14.4P
Honolulu, Hawaii 48.66 8:44.022:16:23.0P
Tokyo, Japan 53.64 9:21.522:17:00.5P
Beijing, China 69.2611:07.222:18:46.2P
Anchorage, Alaska 80.9712:14.822:19:53.8P
San Francisco, California 83.2612:26.822:20:05.8P
Los Angeles, California 85.2212:36.722:20:15.7P
Seattle, Washington 86.9712:45.422:20:24.4P
Kathmandu, Nepal 87.4912:47.922:20:26.9P
Phoenix, Arizona 89.9912:59.622:20:38.6P
Palmer Station, Antarctica 92.6113:11.822:20:50.8P
Albuquerque, New Mexico 94.7513:21.622:21:00.6P
Golden, Colorado 96.7413:30.622:21:09.6P
Mexico City, Mexico 98.4413:38.222:21:17.2Pdiff
Brownsville, Texas 100.9813:49.522:21:28.5Pdiff
Wichita, Kansas 102.5613:56.522:21:35.5Pdiff
Duluth, Minnesota 106.8414:15.522:21:54.5Pdiff
St. Louis, Missouri 108.1814:21.422:22:00.4Pdiff
Knoxville, Tennessee 112.2314:39.422:22:18.4Pdiff
Lima, Peru 112.9514:42.622:22:21.6Pdiff
Miami, Florida 116.5214:58.422:22:37.4Pdiff
Ottawa, Canada 118.3515:06.522:22:45.5Pdiff
Washington, D.C. 118.4715:07.122:22:46.1Pdiff
Philadelphia, Pennsylvania 119.7615:12.822:22:51.8Pdiff
New York, New York 120.5015:16.122:22:55.1Pdiff
Moscow, Russia 121.0115:18.322:22:57.3Pdiff
Boston, Massachusetts 122.3015:24.122:23:03.1Pdiff
Bangor, Maine 123.2615:28.422:23:07.4Pdiff
Nairobi, Kenya 127.7915:48.522:23:27.5Pdiff
San Juan, Puerto Rico 129.4615:55.922:23:34.9Pdiff
Bergen, Norway 129.7815:57.322:23:36.3Pdiff
London, England 139.1816:39.022:24:18.0Pdiff
Rome, Italy 142.4316:53.422:24:32.4Pdiff

Travel Time Information and Calculator

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