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Earthquake Hazards Program

Magnitude 6.7 GUAM REGION

Friday, May 09, 2008 at 21:51:29 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
Agana, Guam 1.85 0:29.821:51:59.8Pn
Tokyo, Japan 23.31 5:01.321:56:31.3P
Beijing, China 36.09 6:54.421:58:24.4P
Brisbane, Australia 40.85 7:34.321:59:04.3P
Kathmandu, Nepal 55.93 9:30.222:01:00.2P
Honolulu, Hawaii 56.89 9:37.022:01:07.0P
Wellington, New Zealand 60.9310:05.022:01:35.0P
Anchorage, Alaska 68.1210:52.022:02:22.0P
Seattle, Washington 83.9012:21.622:03:51.6P
San Francisco, California 85.9312:31.822:04:01.8P
Moscow, Russia 88.3012:43.222:04:13.2P
Los Angeles, California 90.1112:51.722:04:21.7P
Phoenix, Arizona 95.2113:15.122:04:45.1P
Golden, Colorado 98.1313:28.222:04:58.2P
Albuquerque, New Mexico 98.8713:31.522:05:01.5Pdiff
Bergen, Norway 99.9913:36.522:05:06.5Pdiff
Duluth, Minnesota 103.1013:50.322:05:20.3Pdiff
Wichita, Kansas 104.5213:56.622:05:26.6Pdiff
Nairobi, Kenya 106.2114:04.122:05:34.1Pdiff
London, England 108.8114:15.622:05:45.6Pdiff
St. Louis, Missouri 108.8214:15.722:05:45.7Pdiff
Rome, Italy 109.4314:18.422:05:48.4Pdiff
Brownsville, Texas 109.7614:19.922:05:49.9Pdiff
Mexico City, Mexico 110.9514:25.122:05:55.1Pdiff
Ottawa, Canada 112.5514:32.322:06:02.2Pdiff
Knoxville, Tennessee 113.6914:37.322:06:07.3Pdiff
Bangor, Maine 116.0914:48.022:06:18.0Pdiff
Washington, D.C. 116.6414:50.422:06:20.4Pdiff
Philadephia, Pennsylvania 116.8814:51.422:06:21.4Pdiff
New York, New York 116.9114:51.622:06:21.6Pdiff
Boston, Massachusetts 117.0714:52.322:06:22.3Pdiff
Palmer Station, Antarctica 121.9215:13.822:06:43.8Pdiff
Miami, Florida 123.2315:19.622:06:49.6Pdiff
San Juan, Puerto Rico 137.8216:24.422:07:54.4Pdiff
Lima, Peru 140.7416:37.422:08:07.4Pdiff

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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