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Earthquake Hazards Program

Magnitude 6.8 SEA OF JAPAN

Monday, July 16, 2007 at 14:17:37 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
Tokyo, Japan 4.11 1:08.214:18:42.2Pn
Beijing, China 14.79 3:13.914:20:47.9P
Agana, Guam 24.85 4:54.514:22:28.5P
Kathmandu, Nepal 42.47 7:24.614:24:58.6P
Anchorage, Alaska 51.64 8:35.014:26:09.0P
Honolulu, Hawaii 59.73 9:32.114:27:06.1P
Moscow, Russia 64.2110:01.714:27:35.7P
Brisbane, Australia 66.1710:14.214:27:48.2P
Seattle, Washington 71.3410:45.914:28:19.9P
Bergen, Norway 74.7211:05.614:28:39.6P
San Francisco, California 77.0911:19.014:28:53.0P
Los Angeles, California 82.0511:45.414:29:19.4P
London, England 83.6711:53.714:29:27.7P
Rome, Italy 85.6712:03.514:29:37.5P
Wellington, New Zealand 85.8512:04.514:29:38.5P
Golden, Colorado 85.9512:05.014:29:38.9P
Phoenix, Arizona 86.3412:06.814:29:40.8P
Duluth, Minnesota 86.7712:08.914:29:42.9P
Albuquerque, New Mexico 88.4712:16.914:29:50.9P
Wichita, Kansas 91.5312:31.014:30:05.0P
Ottawa, Canada 93.6612:40.814:30:14.8P
St. Louis, Missouri 94.1812:43.214:30:17.2P
Bangor, Maine 96.0412:51.614:30:25.6P
Nairobi, Kenya 97.1912:56.714:30:30.7P
Boston, Massachusetts 97.7912:59.414:30:33.4Pdiff
New York, New York 98.4713:02.414:30:36.4Pdiff
Knoxville, Tennessee 98.6613:03.214:30:37.2Pdiff
Philadephia, Pennsylvania 98.8213:03.914:30:37.9Pdiff
Washington, D.C. 99.1713:05.514:30:39.5Pdiff
Brownsville, Texas 100.5413:11.614:30:45.6Pdiff
Mexico City, Mexico 104.3813:28.614:31:02.6Pdiff
Miami, Florida 109.5813:51.714:31:25.7Pdiff
San Juan, Puerto Rico 121.5814:45.014:32:19.0Pdiff
Lima, Peru 142.2616:16.814:33:50.8Pdiff
Palmer Station, Antarctica 147.1719:02.714:36:36.7PKPdf

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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