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 19.94 4:30.019:35:03.0P
Wellington, New Zealand 31.08 6:16.119:36:49.1P
Agana, Guam 31.92 6:23.519:36:56.5P
Honolulu, Hawaii 48.49 8:40.519:39:13.5P
Tokyo, Japan 52.53 9:11.019:39:44.0P
Beijing, China 68.1410:57.919:41:30.9P
Anchorage, Alaska 80.3112:08.919:42:41.9P
San Francisco, California 83.1312:23.819:42:56.8P
Los Angeles, California 85.1812:34.219:43:07.2P
Kathmandu, Nepal 86.4912:40.719:43:13.7P
Seattle, Washington 86.6612:41.519:43:14.5P
Phoenix, Arizona 89.9912:57.319:43:30.3P
Palmer Station, Antarctica 93.6913:14.319:43:47.3P
Albuquerque, New Mexico 94.7313:19.119:43:52.1P
Golden, Colorado 96.6413:27.719:44:00.7P
Mexico City, Mexico 98.7513:37.219:44:10.2Pdiff
Brownsville, Texas 101.1713:47.919:44:20.9Pdiff
Wichita, Kansas 102.5113:53.919:44:26.9Pdiff
Duluth, Minnesota 106.6114:12.119:44:45.1Pdiff
St. Louis, Missouri 108.1214:18.819:44:51.8Pdiff
Knoxville, Tennessee 112.2314:37.019:45:10.0Pdiff
Lima, Peru 113.8414:44.219:45:17.2Pdiff
Miami, Florida 116.7314:57.019:45:30.0Pdiff
Ottawa, Canada 118.1215:03.219:45:36.1Pdiff
Washington, D.C. 118.3915:04.419:45:37.4Pdiff
Philadelphia, Pennsylvania 119.6515:09.919:45:42.9Pdiff
Moscow, Russia 119.8815:11.019:45:44.0Pdiff
New York, New York 120.3715:13.119:45:46.1Pdiff
Boston, Massachusetts 122.1215:20.919:45:53.9Pdiff
Bangor, Maine 123.0215:24.919:45:57.9Pdiff
Nairobi, Kenya 127.3515:44.119:46:17.1Pdiff
Bergen, Norway 128.7415:50.319:46:23.3Pdiff
San Juan, Puerto Rico 129.8415:55.219:46:28.2Pdiff
London, England 138.1316:32.019:47:05.0Pdiff
Rome, Italy 141.3116:46.119:47:19.1Pdiff

Travel Time Information and Calculator

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