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 20.01 4:29.622:17:04.6P
Agana, Guam 30.99 6:13.922:18:48.9P
Wellington, New Zealand 31.83 6:21.322:18:56.3P
Honolulu, Hawaii 48.69 8:40.622:21:15.6P
Tokyo, Japan 51.67 9:03.222:21:38.2P
Beijing, China 67.2110:50.622:23:25.6P
Anchorage, Alaska 80.0312:05.922:24:40.9P
San Francisco, California 83.3412:23.322:24:58.3P
Los Angeles, California 85.4712:34.122:25:09.1P
Kathmandu, Nepal 85.5412:34.522:25:09.5P
Seattle, Washington 86.7112:40.222:25:15.2P
Phoenix, Arizona 90.3012:57.222:25:32.2P
Palmer Station, Antarctica 94.4613:16.322:25:51.3P
Albuquerque, New Mexico 95.0313:19.022:25:54.0P
Golden, Colorado 96.8713:27.222:26:02.2P
Mexico City, Mexico 99.3013:38.122:26:13.1Pdiff
Brownsville, Texas 101.6313:48.422:26:23.4Pdiff
Wichita, Kansas 102.7913:53.522:26:28.5Pdiff
Duluth, Minnesota 106.7414:11.122:26:46.1Pdiff
St. Louis, Missouri 108.3914:18.422:26:53.4Pdiff
Knoxville, Tennessee 112.5314:36.822:27:11.8Pdiff
Lima, Peru 114.7514:46.722:27:21.7Pdiff
Miami, Florida 117.2014:57.522:27:32.5Pdiff
Ottawa, Canada 118.2415:02.122:27:37.1Pdiff
Washington, D.C. 118.6415:03.922:27:38.9Pdiff
Moscow, Russia 119.0015:05.522:27:40.5Pdiff
Philadelphia, Pennsylvania 119.8715:09.422:27:44.4Pdiff
New York, New York 120.5715:12.522:27:47.5Pdiff
Boston, Massachusetts 122.2915:20.122:27:55.1Pdiff
Bangor, Maine 123.1315:23.822:27:58.8Pdiff
Nairobi, Kenya 126.7015:39.722:28:14.7Pdiff
Bergen, Norway 128.0015:45.522:28:20.5Pdiff
San Juan, Puerto Rico 130.4315:56.222:28:31.2Pdiff
London, England 137.3916:27.122:29:02.1Pdiff
Rome, Italy 140.4016:40.522:29:15.5Pdiff

Travel Time Information and Calculator

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