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Earthquake Hazards Program


Thursday, October 08, 2009 at 21:16:12 UTC

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 19.09 4:22.821:20:34.8P
Wellington, New Zealand 29.29 6:02.621:22:14.6P
Agana, Guam 33.70 6:41.321:22:53.3P
Honolulu, Hawaii 49.00 8:46.821:24:58.8P
Tokyo, Japan 54.36 9:26.821:25:38.8P
Beijing, China 69.9211:11.421:27:23.4P
Anchorage, Alaska 81.5712:18.121:28:30.1P
San Francisco, California 83.5812:28.521:28:40.5P
Los Angeles, California 85.4912:38.221:28:50.2P
Seattle, Washington 87.4012:47.521:28:59.5P
Kathmandu, Nepal 88.0012:50.421:29:02.4P
Phoenix, Arizona 90.2313:00.921:29:12.9P
Palmer Station, Antarctica 91.8813:08.521:29:20.5P
Albuquerque, New Mexico 95.0013:22.821:29:34.8P
Golden, Colorado 97.0413:32.021:29:44.0P
Mexico City, Mexico 98.4913:38.521:29:50.5Pdiff
Brownsville, Texas 101.1013:50.121:30:02.1Pdiff
Wichita, Kansas 102.8313:57.721:30:09.7Pdiff
Duluth, Minnesota 107.2114:17.221:30:29.2Pdiff
St. Louis, Missouri 108.4614:22.721:30:34.7Pdiff
Knoxville, Tennessee 112.4714:40.521:30:52.5Pdiff
Lima, Peru 112.5514:40.921:30:52.9Pdiff
Miami, Florida 116.6214:59.021:31:11.0Pdiff
Ottawa, Canada 118.7115:08.321:31:20.3Pdiff
Washington, D.C. 118.7615:08.421:31:20.5Pdiff
Philadelphia, Pennsylvania 120.0515:14.221:31:26.2Pdiff
New York, New York 120.8115:17.521:31:29.5Pdiff
Moscow, Russia 121.7115:21.521:31:33.5Pdiff
Boston, Massachusetts 122.6415:25.721:31:37.7Pdiff
Bangor, Maine 123.6415:30.121:31:42.1Pdiff
Nairobi, Kenya 127.8315:48.721:32:00.7Pdiff
San Juan, Puerto Rico 129.4515:55.921:32:07.9Pdiff
Bergen, Norway 130.5116:00.621:32:12.6Pdiff
London, England 139.9116:42.421:32:54.4Pdiff
Rome, Italy 143.1216:56.621:33:08.6Pdiff

Travel Time Information and Calculator

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

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