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Earthquake Hazards Program

Theoretical P-Wave Travel Times

Magnitude 6.5 CENTRAL CALIFORNIA
2003 December 22 19:15:56 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
San Francisco, California 2.32 0:38.519:16:34.5Pn
Los Angeles, California 2.87 0:46.119:16:42.1Pn
Albuquerque, New Mexico 11.83 2:49.019:18:45.0Pn
Seattle, Washington 12.11 2:52.919:18:48.9Pn
Golden, Colorado 13.22 3:08.019:19:04.0Pn
Wichita, Kansas 19.15 4:23.719:20:19.8P
Brownsville, Texas 22.46 4:59.519:20:55.5P
Duluth, Minnesota 24.26 5:17.619:21:13.6P
St. Louis, Missouri 24.70 5:21.519:21:17.5P
Mexico City, Mexico 25.24 5:26.419:21:22.4P
Knoxville, Tennessee 29.04 6:00.619:21:56.6P
Anchorage, Alaska 31.39 6:21.419:22:17.4P
Washington, D.C. 34.94 6:52.319:22:48.3P
Honolulu, Hawaii 35.10 6:53.719:22:49.7P
Ottawa, Canada 35.40 6:56.319:22:52.3P
Philadephia, Pennsylvania 36.22 7:03.319:22:59.3P
Miami, Florida 36.32 7:04.119:23:00.1P
New York, New York 36.99 7:09.919:23:05.9P
Boston, Massachusetts 38.96 7:26.419:23:22.4P
Bangor, Maine 40.35 7:38.019:23:34.0P
San Juan, Puerto Rico 51.21 9:03.819:24:59.8P
Lima, Peru 63.1810:28.619:26:24.6P
Bergen, Norway 74.6811:40.219:27:36.2P
Tokyo, Japan 76.5911:51.119:27:47.1P
London, England 78.9312:04.219:28:00.2P
Agana, Guam 85.5812:38.919:28:34.9P
Moscow, Russia 87.1312:46.519:28:42.5P
Beijing, China 87.9812:50.619:28:46.6P
Rome, Italy 91.8813:08.819:29:04.8P
Wellington, New Zealand 96.5513:30.119:29:26.1P
Brisbane, Australia 102.4213:56.319:29:52.2Pdiff
Palmer Station, Antarctica 111.6514:37.219:30:33.2Pdiff
Kathmandu, Nepal 112.1914:39.619:30:35.6Pdiff
Nairobi, Kenya 140.0916:43.419:32:39.4Pdiff


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