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 19.92 4:28.619:27:30.6P
Wellington, New Zealand 30.59 6:10.419:29:12.4P
Agana, Guam 32.55 6:27.519:29:29.5P
Honolulu, Hawaii 48.36 8:38.019:31:40.0P
Tokyo, Japan 53.10 9:13.719:32:15.7P
Beijing, China 68.7511:00.219:34:02.2P
Anchorage, Alaska 80.4812:08.219:35:10.2P
San Francisco, California 82.9812:21.419:35:23.4P
Los Angeles, California 84.9812:31.619:35:33.6P
Seattle, Washington 86.6112:39.619:35:41.6P
Kathmandu, Nepal 87.1312:42.119:35:44.1P
Phoenix, Arizona 89.7712:54.619:35:56.6P
Palmer Station, Antarctica 93.1813:10.419:36:12.4P
Albuquerque, New Mexico 94.5213:16.519:36:18.5P
Golden, Colorado 96.4713:25.419:36:27.4P
Mexico City, Mexico 98.3713:33.919:36:35.9Pdiff
Brownsville, Texas 100.8513:44.919:36:46.9Pdiff
Wichita, Kansas 102.3213:51.419:36:53.4Pdiff
Duluth, Minnesota 106.5214:10.019:37:12.0Pdiff
St. Louis, Missouri 107.9414:16.319:37:18.3Pdiff
Knoxville, Tennessee 112.0114:34.419:37:36.4Pdiff
Lima, Peru 113.2314:39.819:37:41.8Pdiff
Miami, Florida 116.4014:53.919:37:55.9Pdiff
Ottawa, Canada 118.0315:01.119:38:03.1Pdiff
Washington, D.C. 118.2215:01.919:38:03.9Pdiff
Philadelphia, Pennsylvania 119.4915:07.619:38:09.6Pdiff
New York, New York 120.2215:10.819:38:12.8Pdiff
Moscow, Russia 120.4815:12.019:38:14.0Pdiff
Boston, Massachusetts 122.0015:18.719:38:20.7Pdiff
Bangor, Maine 122.9415:22.919:38:24.9Pdiff
Nairobi, Kenya 127.7915:44.519:38:46.5Pdiff
Bergen, Norway 129.2215:50.819:38:52.8Pdiff
San Juan, Puerto Rico 129.4315:51.719:38:53.7Pdiff
London, England 138.6216:32.519:39:34.5Pdiff
Rome, Italy 141.9116:47.119:39:49.1Pdiff

Travel Time Information and Calculator

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