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Earthquake Hazards Program

Theoretical P-Wave Travel Times

2004 June 28 09:49:47 UTC

Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver

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
Anchorage, Alaska 10.29 2:26.5 9:52:14.5Pn
Seattle, Washington 10.42 2:28.3 9:52:16.3Pn
San Francisco, California 19.07 4:21.1 9:54:09.1P
Los Angeles, California 23.79 5:11.5 9:54:59.5P
Golden, Colorado 24.72 5:19.9 9:55:07.9P
Duluth, Minnesota 27.51 5:45.1 9:55:33.1P
Albuquerque, New Mexico 27.65 5:46.4 9:55:34.4P
Wichita, Kansas 30.35 6:10.4 9:55:58.4P
St. Louis, Missouri 33.66 6:39.4 9:56:27.4P
Ottawa, Canada 37.69 7:13.9 9:57:01.9P
Honolulu, Hawaii 38.00 7:16.6 9:57:04.6P
Knoxville, Tennessee 38.45 7:20.3 9:57:08.3P
Brownsville, Texas 39.63 7:30.2 9:57:18.2P
Washington, D.C. 41.08 7:42.2 9:57:30.2P
Philadephia, Pennsylvania 41.45 7:45.2 9:57:33.2P
New York, New York 41.61 7:46.6 9:57:34.6P
Bangor, Maine 41.97 7:49.5 9:57:37.5P
Boston, Massachusetts 42.23 7:51.6 9:57:39.6P
Mexico City, Mexico 44.41 8:09.2 9:57:57.2P
Miami, Florida 48.90 8:44.4 9:58:32.4P
Tokyo, Japan 59.4610:01.5 9:59:49.5P
Bergen, Norway 60.5710:09.1 9:59:57.1P
San Juan, Puerto Rico 62.5910:22.710:00:10.7P
London, England 67.2310:52.910:00:40.9P
Beijing, China 67.8710:57.010:00:45.0P
Moscow, Russia 69.4111:06.610:00:54.6P
Agana, Guam 73.8711:33.510:01:21.5P
Rome, Italy 79.4312:04.910:01:52.9P
Lima, Peru 82.3012:20.210:02:08.2P
Kathmandu, Nepal 90.8713:02.110:02:50.1P
Brisbane, Australia 102.8713:56.310:03:44.3Pdiff
Wellington, New Zealand 105.2614:06.910:03:54.9Pdiff
Nairobi, Kenya 125.9615:38.710:05:26.7Pdiff
Palmer Station, Antarctica 133.0116:10.110:05:58.1Pdiff


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