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Earthquake Hazards Program

Magnitude 3.3 NORTHERN IDAHO

2003 September 22 14:06:19 UTC

Preliminary Earthquake Report

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

Theoretical P-Wave Travel Times

Theoretical P-wave Travel Times
Theoretical P-wave Travel Times

These maps show 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
Seattle, Washington 3.57 0:55.014:07:14.0Pn
San Francisco, California 10.86 2:35.114:08:54.1Pn
Golden, Colorado 11.79 2:47.814:09:06.8Pn
Los Angeles, California 13.86 3:16.214:09:35.2Pn
Albuquerque, New Mexico 14.97 3:31.214:09:50.2Pn
Duluth, Minnesota 16.88 3:55.914:10:14.9Pn
Wichita, Kansas 17.59 4:04.814:10:23.8Pn
St. Louis, Missouri 21.47 4:48.214:11:07.2P
Anchorage, Alaska 22.96 5:04.014:11:23.0P
Knoxville, Tennessee 26.35 5:35.714:11:54.7P
Brownsville, Texas 26.80 5:39.714:11:58.7P
Ottawa, Canada 28.22 5:52.514:12:11.5P
Washington, D.C. 30.13 6:09.414:12:28.4P
Philadephia, Pennsylvania 30.86 6:15.914:12:34.9P
New York, New York 31.28 6:19.614:12:38.6P
Mexico City, Mexico 31.90 6:25.014:12:44.0P
Boston, Massachusetts 32.51 6:30.314:12:49.3P
Bangor, Maine 33.03 6:34.914:12:53.9P
Miami, Florida 36.35 7:03.514:13:22.5P
Honolulu, Hawaii 42.08 7:51.414:14:10.4P
San Juan, Puerto Rico 50.51 8:57.714:15:16.7P
Bergen, Norway 62.4210:22.614:16:41.6P
London, England 67.2110:53.914:17:12.9P
Lima, Peru 69.4911:08.114:17:27.1P
Tokyo, Japan 72.3111:25.314:17:44.3P
Moscow, Russia 74.5811:38.714:17:57.7P
Rome, Italy 80.0912:09.514:18:28.5P
Beijing, China 80.5312:11.914:18:30.9P
Agana, Guam 85.5612:37.914:18:56.9P
Kathmandu, Nepal 102.1213:54.014:20:13.0Pdiff
Wellington, New Zealand 107.3214:17.114:20:36.1Pdiff
Brisbane, Australia 109.8514:28.314:20:47.3Pdiff
Palmer Station, Antarctica 121.9915:22.214:21:41.2Pdiff
Nairobi, Kenya 128.3515:50.414:22:09.4Pdiff

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