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 20.01 4:27.120:42:28.1P
Brisbane, Australia 21.98 4:48.220:42:49.2P
Wellington, New Zealand 41.22 7:37.920:45:38.9P
Tokyo, Japan 42.40 7:47.520:45:48.5P
Beijing, China 55.60 9:28.520:47:29.5P
Honolulu, Hawaii 56.13 9:32.320:47:33.3P
Kathmandu, Nepal 71.9511:16.120:49:17.1P
Anchorage, Alaska 80.1812:02.920:50:03.9P
San Francisco, California 90.0112:51.920:50:52.9P
Seattle, Washington 91.2612:57.720:50:58.7P
Los Angeles, California 93.0213:05.920:51:06.9P
Phoenix, Arizona 98.1313:29.020:51:30.0P
Albuquerque, New Mexico 102.6213:48.920:51:49.9Pdiff
Palmer Station, Antarctica 102.7313:49.420:51:50.4Pdiff
Golden, Colorado 103.5013:52.820:51:53.8Pdiff
Moscow, Russia 107.8614:12.220:52:13.2Pdiff
Mexico City, Mexico 109.7914:20.720:52:21.7Pdiff
Wichita, Kansas 109.8314:20.920:52:21.9Pdiff
Brownsville, Texas 111.0314:26.220:52:27.2Pdiff
Duluth, Minnesota 111.6814:29.120:52:30.1Pdiff
Nairobi, Kenya 114.6414:42.220:52:43.2Pdiff
St. Louis, Missouri 115.1314:44.420:52:45.4Pdiff
Bergen, Norway 119.5715:04.120:53:05.1Pdiff
Knoxville, Tennessee 119.7515:04.920:53:05.9Pdiff
Ottawa, Canada 122.7515:18.220:53:19.2Pdiff
Washington, D.C. 124.8115:27.420:53:28.4Pdiff
Philadelphia, Pennsylvania 125.6715:31.220:53:32.2Pdiff
New York, New York 126.1115:33.120:53:34.1Pdiff
Miami, Florida 126.4715:34.820:53:35.8Pdiff
Boston, Massachusetts 127.2015:38.020:53:39.0Pdiff
Bangor, Maine 127.2315:38.120:53:39.1Pdiff
Lima, Peru 128.4715:43.620:53:44.6Pdiff
London, England 128.4915:43.720:53:44.7Pdiff
Rome, Italy 128.7215:44.820:53:45.8Pdiff
San Juan, Puerto Rico 140.8616:38.620:54:39.6Pdiff

Travel Time Information and Calculator

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