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Earthquake Hazards Program

Magnitude 7.6 TONGA REGION

Thursday, March 19, 2009 at 18:17:40 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
Wellington, New Zealand 20.21 4:35.018:22:12.0P
Brisbane, Australia 29.43 6:03.718:23:40.7P
Honolulu, Hawaii 47.05 8:31.618:26:08.6P
Agana, Guam 53.71 9:22.018:26:59.0P
Tokyo, Japan 72.5111:27.018:29:04.0P
Palmer Station, Antarctica 76.3811:49.518:29:26.5P
San Francisco, California 77.9511:58.318:29:35.3P
Los Angeles, California 78.1611:59.518:29:36.5P
Phoenix, Arizona 81.9512:20.018:29:57.0P
Seattle, Washington 84.7612:34.418:30:11.4P
Mexico City, Mexico 84.9712:35.518:30:12.5P
Anchorage, Alaska 86.3112:42.118:30:19.1P
Albuquerque, New Mexico 86.6312:43.718:30:20.7P
Brownsville, Texas 89.2112:56.018:30:33.0P
Beijing, China 89.5412:57.518:30:34.5P
Golden, Colorado 89.9812:59.618:30:36.6P
Lima, Peru 92.3113:10.418:30:47.4P
Wichita, Kansas 94.4913:20.418:30:57.4P
St. Louis, Missouri 99.9713:45.018:31:22.0Pdiff
Duluth, Minnesota 101.5813:52.118:31:29.1Pdiff
Knoxville, Tennessee 102.8413:57.718:31:34.7Pdiff
Miami, Florida 103.5714:00.918:31:37.9Pdiff
Kathmandu, Nepal 108.6814:23.618:32:00.6Pdiff
Washington, D.C. 109.8714:28.918:32:05.9Pdiff
Philadelphia, Pennsylvania 111.5314:36.318:32:13.3Pdiff
Ottawa, Canada 112.2214:39.318:32:16.3Pdiff
New York, New York 112.5514:40.818:32:17.8Pdiff
San Juan, Puerto Rico 113.7114:45.918:32:22.9Pdiff
Boston, Massachusetts 115.0014:51.718:32:28.7Pdiff
Bangor, Maine 117.0015:00.518:32:37.5Pdiff
Moscow, Russia 139.4816:40.318:34:17.3Pdiff
Nairobi, Kenya 140.8816:46.518:34:23.5Pdiff
Bergen, Norway 142.6716:54.518:34:31.5Pdiff
London, England 151.2719:48.418:37:25.4PKPdf
Rome, Italy 160.2320:00.918:37:37.9PKPdf

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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