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 19.60 4:24.815:47:47.8P
Wellington, New Zealand 30.99 6:13.515:49:36.5P
Agana, Guam 31.84 6:21.015:49:44.0P
Honolulu, Hawaii 48.86 8:41.515:52:04.5P
Tokyo, Japan 52.54 9:09.215:52:32.2P
Beijing, China 68.0710:55.515:54:18.5P
Anchorage, Alaska 80.5912:08.415:55:31.4P
San Francisco, California 83.5012:23.615:55:46.6P
Los Angeles, California 85.5612:34.015:55:57.0P
Kathmandu, Nepal 86.2912:37.615:56:00.6P
Seattle, Washington 87.0112:41.115:56:04.1P
Phoenix, Arizona 90.3712:56.915:56:19.9P
Palmer Station, Antarctica 93.6113:11.915:56:34.9P
Albuquerque, New Mexico 95.1113:18.715:56:41.7P
Golden, Colorado 97.0113:27.315:56:50.3P
Mexico City, Mexico 99.1213:36.715:56:59.7Pdiff
Brownsville, Texas 101.5513:47.515:57:10.5Pdiff
Wichita, Kansas 102.8913:53.415:57:16.4Pdiff
Duluth, Minnesota 106.9814:11.615:57:34.6Pdiff
St. Louis, Missouri 108.5014:18.315:57:41.3Pdiff
Knoxville, Tennessee 112.6014:36.615:57:59.6Pdiff
Lima, Peru 114.1014:43.215:58:06.2Pdiff
Miami, Florida 117.1114:56.615:58:19.6Pdiff
Ottawa, Canada 118.4815:02.715:58:25.7Pdiff
Washington, D.C. 118.7715:03.915:58:26.9Pdiff
Moscow, Russia 119.8715:08.815:58:31.8Pdiff
Philadelphia, Pennsylvania 120.0215:09.515:58:32.5Pdiff
New York, New York 120.7415:12.715:58:35.7Pdiff
Boston, Massachusetts 122.4915:20.515:58:43.5Pdiff
Bangor, Maine 123.3815:24.415:58:47.4Pdiff
Nairobi, Kenya 126.9915:40.415:59:03.4Pdiff
Bergen, Norway 128.8415:48.615:59:11.6Pdiff
San Juan, Puerto Rico 130.2115:54.715:59:17.7Pdiff
London, England 138.2216:30.315:59:53.3Pdiff
Rome, Italy 141.2716:43.816:00:06.8Pdiff

Travel Time Information and Calculator

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