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Earthquake Hazards Program


Wednesday, August 12, 2009 at 22:48:51 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 2.94 0:44.922:49:40.9Pn
Agana, Guam 19.62 4:20.722:53:16.7P
Beijing, China 20.53 4:30.522:53:26.5P
Kathmandu, Nepal 47.39 8:24.322:57:20.3P
Anchorage, Alaska 52.23 9:01.022:57:57.0P
Honolulu, Hawaii 55.54 9:25.122:58:21.1P
Brisbane, Australia 61.1110:03.922:58:59.9P
Moscow, Russia 70.1511:02.122:59:58.1P
Seattle, Washington 71.0111:07.323:00:03.3P
San Francisco, California 75.8411:35.723:00:31.7P
Bergen, Norway 80.1511:59.523:00:55.5P
Wellington, New Zealand 80.2111:59.823:00:55.8P
Los Angeles, California 80.6812:02.323:00:58.3P
Phoenix, Arizona 85.2512:25.923:01:21.9P
Golden, Colorado 85.7412:28.323:01:24.3P
Duluth, Minnesota 87.8012:38.223:01:34.2P
Albuquerque, New Mexico 87.8212:38.423:01:34.4P
London, England 89.2212:44.923:01:40.9P
Rome, Italy 91.6112:56.123:01:52.1P
Wichita, Kansas 91.6312:56.123:01:52.1P
St. Louis, Missouri 94.7913:10.623:02:06.6P
Ottawa, Canada 95.5913:14.323:02:10.3P
Bangor, Maine 98.3913:26.823:02:22.8Pdiff
Knoxville, Tennessee 99.4513:31.523:02:27.5Pdiff
Brownsville, Texas 99.7713:32.923:02:28.9Pdiff
Boston, Massachusetts 99.8913:33.523:02:29.5Pdiff
New York, New York 100.3013:35.323:02:31.3Pdiff
Philadelphia, Pennsylvania 100.5313:36.323:02:32.3Pdiff
Washington, D.C. 100.7013:37.023:02:33.0Pdiff
Nairobi, Kenya 102.0713:43.123:02:39.1Pdiff
Mexico City, Mexico 103.0213:47.323:02:43.3Pdiff
Miami, Florida 110.1614:19.023:03:15.0Pdiff
San Juan, Puerto Rico 123.1015:16.523:04:12.5Pdiff
Lima, Peru 140.0616:31.823:05:27.8Pdiff
Palmer Station, Antarctica 142.1816:41.223:05:37.2Pdiff

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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