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Earthquake Hazards Program

Magnitude 6.9 TONGA

Sunday, October 19, 2008 at 05:10:33 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 21.69 4:47.1 5:15:23.1P
Brisbane, Australia 30.56 6:09.5 5:16:45.5P
Honolulu, Hawaii 45.58 8:15.7 5:18:51.7P
Agana, Guam 53.57 9:16.5 5:19:52.5P
Tokyo, Japan 72.0111:19.4 5:21:55.4P
San Francisco, California 76.4611:45.3 5:22:21.3P
Los Angeles, California 76.7011:46.6 5:22:22.6P
Palmer Station, Antarctica 77.2611:49.8 5:22:25.8P
Phoenix, Arizona 80.5112:07.6 5:22:43.6P
Seattle, Washington 83.2612:22.0 5:22:58.0P
Mexico City, Mexico 83.7312:24.5 5:23:00.5P
Anchorage, Alaska 84.9112:30.4 5:23:06.4P
Albuquerque, New Mexico 85.1912:31.8 5:23:07.8P
Brownsville, Texas 87.8912:45.0 5:23:21.0P
Golden, Colorado 88.5312:48.0 5:23:24.0P
Beijing, China 89.2412:51.4 5:23:27.4P
Lima, Peru 91.8313:03.4 5:23:39.4P
Wichita, Kansas 93.0713:09.1 5:23:45.1P
St. Louis, Missouri 98.5613:33.9 5:24:09.9Pdiff
Duluth, Minnesota 100.1113:40.8 5:24:16.8Pdiff
Knoxville, Tennessee 101.4613:46.8 5:24:22.8Pdiff
Miami, Florida 102.3413:50.7 5:24:26.7Pdiff
Washington, D.C. 108.4914:18.0 5:24:54.0Pdiff
Kathmandu, Nepal 108.9314:19.9 5:24:55.9Pdiff
Philadephia, Pennsylvania 110.1414:25.3 5:25:01.3Pdiff
Ottawa, Canada 110.7814:28.1 5:25:04.1Pdiff
New York, New York 111.1514:29.8 5:25:05.8Pdiff
San Juan, Puerto Rico 112.6714:36.5 5:25:12.5Pdiff
Boston, Massachusetts 113.5914:40.6 5:25:16.6Pdiff
Bangor, Maine 115.5714:49.4 5:25:25.4Pdiff
Moscow, Russia 138.7216:32.2 5:27:08.2Pdiff
Bergen, Norway 141.4016:44.1 5:27:20.1Pdiff
Nairobi, Kenya 142.2516:47.8 5:27:23.8Pdiff
London, England 149.9119:39.9 5:30:15.9PKPdf
Rome, Italy 159.2219:52.8 5:30:28.8PKPdf

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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