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Earthquake Hazards Program

Magnitude 6.2 TONGA

Thursday, June 26, 2008 at 21:19:15 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 22.86 5:02.021:24:15.0P
Brisbane, Australia 31.38 6:19.421:25:32.4P
Honolulu, Hawaii 44.42 8:09.221:27:22.2P
Agana, Guam 53.36 9:17.821:28:30.8P
Tokyo, Japan 71.5011:19.321:30:32.3P
San Francisco, California 75.3211:41.821:30:54.8P
Los Angeles, California 75.5911:43.421:30:56.4P
Palmer Station, Antarctica 78.0611:57.321:31:10.3P
Phoenix, Arizona 79.4312:04.821:31:17.8P
Seattle, Washington 82.0912:19.021:31:32.0P
Mexico City, Mexico 82.8412:22.921:31:35.9P
Anchorage, Alaska 83.7712:27.821:31:40.8P
Albuquerque, New Mexico 84.1212:29.521:31:42.5P
Brownsville, Texas 86.9312:43.521:31:56.5P
Golden, Colorado 87.4312:45.921:31:58.9P
Beijing, China 88.8912:52.821:32:05.8P
Lima, Peru 91.5813:05.321:32:18.3P
Wichita, Kansas 92.0013:07.321:32:20.3P
St. Louis, Missouri 97.5013:32.321:32:45.3P
Duluth, Minnesota 99.0013:39.021:32:52.0Pdiff
Knoxville, Tennessee 100.4513:45.421:32:58.4Pdiff
Miami, Florida 101.4513:49.921:33:02.9Pdiff
Washington, D.C. 107.4614:16.521:33:29.5Pdiff
Kathmandu, Nepal 108.9914:23.321:33:36.3Pdiff
Philadephia, Pennsylvania 109.1014:23.821:33:36.8Pdiff
Ottawa, Canada 109.6914:26.421:33:39.4Pdiff
New York, New York 110.1114:28.321:33:41.3Pdiff
San Juan, Puerto Rico 111.9514:36.521:33:49.5Pdiff
Boston, Massachusetts 112.5314:39.121:33:52.1Pdiff
Bangor, Maine 114.4914:47.721:34:00.7Pdiff
Moscow, Russia 138.0016:32.121:35:45.1Pdiff
Bergen, Norway 140.3416:42.521:35:55.5Pdiff
Nairobi, Kenya 143.2516:55.421:36:08.4Pdiff
London, England 148.7919:41.421:38:54.4PKPdf
Rome, Italy 158.3019:55.021:39:08.0PKPdf

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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