Theoretical P-Wave Travel Times

Magnitude 4.5 WESTERN MONTANA
Monday, October 31, 2005 at 00:23:30 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

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
(degrees)
Travel Time
(min:secs)
Arrival Time
UTC
Phase
Seattle, Washington 6.79 1:40.2 0:25:10.2Pn
Golden, Colorado 7.99 1:56.7 0:25:26.7Pn
San Francisco, California 9.80 2:21.6 0:25:51.6Pn
Albuquerque, New Mexico 11.11 2:39.4 0:26:09.4Pn
Los Angeles, California 11.45 2:44.1 0:26:14.1Pn
Wichita, Kansas 14.04 3:19.5 0:26:49.5Pn
Duluth, Minnesota 14.95 3:32.0 0:27:02.0Pn
St. Louis, Missouri 18.36 4:15.3 0:27:45.3Pn
Brownsville, Texas 22.91 5:04.7 0:28:34.7P
Knoxville, Tennessee 23.22 5:08.0 0:28:38.0P
Ottawa, Canada 26.46 5:37.9 0:29:07.9P
Anchorage, Alaska 26.84 5:41.3 0:29:11.3P
Washington, D.C. 27.60 5:48.1 0:29:18.1P
Mexico City, Mexico 28.05 5:52.2 0:29:22.2P
Philadelphia, Pennsylvania 28.51 5:56.3 0:29:26.3P
New York, New York 29.04 6:01.0 0:29:31.0P
Boston, Massachusetts 30.53 6:14.2 0:29:44.2P
Bangor, Maine 31.38 6:21.7 0:29:51.7P
Miami, Florida 32.86 6:34.7 0:30:04.7P
Honolulu, Hawaii 43.30 8:02.5 0:31:32.5P
San Juan, Puerto Rico 47.24 8:33.8 0:32:03.8P
Bergen, Norway 63.8710:33.5 0:34:03.5P
Lima, Peru 65.6010:44.9 0:34:14.9P
London, England 68.0811:00.6 0:34:30.6P
Tokyo, Japan 76.0611:48.5 0:35:18.5P
Moscow, Russia 76.8111:52.8 0:35:22.8P
Rome, Italy 81.0112:15.8 0:35:45.8P
Beijing, China 84.4212:33.5 0:36:03.5P
Agana, Guam 88.7812:54.8 0:36:24.8P
Kathmandu, Nepal 105.7614:11.5 0:37:41.5Pdiff
Wellington, New Zealand 107.1414:17.6 0:37:47.6Pdiff
Brisbane, Australia 111.2314:35.8 0:38:05.8Pdiff
Palmer Station, Antarctica 118.3315:07.3 0:38:37.3Pdiff
Nairobi, Kenya 129.2615:55.8 0:39:25.8Pdiff

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