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Earthquake Hazards Program

Magnitude 8.1 SAMOA ISLANDS REGION

Tuesday, September 29, 2009 at 17:48:10 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
(degrees)
Travel Time
(min:secs)
Arrival Time
UTC
Phase
Wellington, New Zealand 27.97 5:42.417:54:01.4P
Brisbane, Australia 34.28 6:37.817:54:56.8P
Honolulu, Hawaii 39.29 7:20.317:55:39.3P
Agana, Guam 51.34 8:55.517:57:14.5P
Tokyo, Japan 68.2210:51.417:59:10.4P
San Francisco, California 70.7611:07.017:59:26.0P
Los Angeles, California 71.2611:10.117:59:29.1P
Phoenix, Arizona 75.2911:33.817:59:52.8P
Seattle, Washington 77.2311:44.818:00:03.8P
Anchorage, Alaska 78.5711:52.218:00:11.2P
Mexico City, Mexico 79.8711:59.318:00:18.3P
Albuquerque, New Mexico 80.0212:00.118:00:19.1P
Palmer Station, Antarctica 82.4412:12.918:00:31.9P
Golden, Colorado 83.1412:16.518:00:35.5P
Brownsville, Texas 83.5812:18.718:00:37.7P
Beijing, China 86.1212:31.418:00:50.4P
Wichita, Kansas 87.9612:40.318:00:59.3P
Lima, Peru 91.7612:58.118:01:17.1P
St. Louis, Missouri 93.5213:06.218:01:25.2P
Duluth, Minnesota 94.5813:11.018:01:30.0P
Knoxville, Tennessee 96.7013:20.618:01:39.6P
Miami, Florida 98.4713:28.518:01:47.5Pdiff
Washington, D.C. 103.6313:51.418:02:10.4Pdiff
Philadelphia, Pennsylvania 105.2213:58.418:02:17.4Pdiff
Ottawa, Canada 105.4913:59.618:02:18.6Pdiff
New York, New York 106.1914:02.718:02:21.7Pdiff
Kathmandu, Nepal 107.8514:10.118:02:29.1Pdiff
Boston, Massachusetts 108.5314:13.118:02:32.1Pdiff
San Juan, Puerto Rico 109.8014:18.718:02:37.7Pdiff
Bangor, Maine 110.3514:21.218:02:40.2Pdiff
Moscow, Russia 133.7716:05.218:04:24.2Pdiff
Bergen, Norway 135.2116:11.618:04:30.6Pdiff
London, England 143.6016:48.818:05:07.8Pdiff
Nairobi, Kenya 146.6919:30.618:07:49.6PKPdf
Rome, Italy 153.4519:41.518:08:00.5PKPdf

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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