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Earthquake Hazards Program


Wednesday, October 07, 2009 at 22:18:53 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 19.41 4:23.022:22:49.0P
Wellington, New Zealand 29.56 6:01.422:24:27.4P
Agana, Guam 33.54 6:36.322:25:02.3P
Honolulu, Hawaii 48.70 8:40.722:27:06.7P
Tokyo, Japan 54.14 9:21.422:27:47.4P
Beijing, China 69.7611:06.622:29:32.6P
Anchorage, Alaska 81.2412:12.422:30:38.4P
San Francisco, California 83.2912:23.122:30:49.1P
Los Angeles, California 85.2112:32.822:30:58.8P
Seattle, Washington 87.0812:42.022:31:08.0P
Kathmandu, Nepal 87.9612:46.222:31:12.2P
Phoenix, Arizona 89.9612:55.622:31:21.6P
Palmer Station, Antarctica 92.1413:05.722:31:31.7P
Albuquerque, New Mexico 94.7213:17.522:31:43.5P
Golden, Colorado 96.7513:26.722:31:52.7P
Mexico City, Mexico 98.2713:33.522:31:59.5P
Brownsville, Texas 100.8613:45.022:32:11.0Pdiff
Wichita, Kansas 102.5413:52.522:32:18.5Pdiff
Duluth, Minnesota 106.9014:11.822:32:37.8Pdiff
St. Louis, Missouri 108.1714:17.522:32:43.5Pdiff
Knoxville, Tennessee 112.1914:35.322:33:01.3Pdiff
Lima, Peru 112.5314:36.822:33:02.8Pdiff
Miami, Florida 116.3814:53.922:33:19.9Pdiff
Ottawa, Canada 118.4115:02.922:33:28.9Pdiff
Washington, D.C. 118.4715:03.222:33:29.2Pdiff
Philadelphia, Pennsylvania 119.7615:08.922:33:34.9Pdiff
New York, New York 120.5115:12.222:33:38.2Pdiff
Moscow, Russia 121.5115:16.722:33:42.7Pdiff
Boston, Massachusetts 122.3415:20.322:33:46.3Pdiff
Bangor, Maine 123.3315:24.722:33:50.8Pdiff
Nairobi, Kenya 128.0215:45.622:34:11.6Pdiff
San Juan, Puerto Rico 129.2515:51.022:34:17.0Pdiff
Bergen, Norway 130.2415:55.422:34:21.4Pdiff
London, England 139.6416:37.122:35:03.1Pdiff
Rome, Italy 142.9316:51.822:35:17.8Pdiff

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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