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Earthquake Hazards Program

Magnitude 2.8 NORTHERN CALIFORNIA

Wednesday, July 18, 2007 at 01:34:58 UTC

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
(degrees)
Travel Time
(min:secs)
Arrival Time
UTC
Phase
San Francisco, California 1.02 0:19.6 1:35:17.6Pg
Los Angeles, California 5.93 1:28.8 1:36:26.8Pn
Seattle, Washington 9.03 2:11.3 1:37:09.3Pn
Phoenix, Arizona 10.12 2:26.2 1:37:24.2Pn
Albuquerque, New Mexico 13.39 3:10.9 1:38:08.9Pn
Golden, Colorado 13.62 3:14.1 1:38:12.1Pn
Wichita, Kansas 19.95 4:33.2 1:39:31.2P
Duluth, Minnesota 23.70 5:13.2 1:40:11.2P
Brownsville, Texas 24.78 5:23.1 1:40:21.1P
St. Louis, Missouri 25.27 5:27.5 1:40:25.5P
Mexico City, Mexico 28.06 5:52.7 1:40:50.7P
Anchorage, Alaska 28.08 5:52.9 1:40:50.9P
Knoxville, Tennessee 29.85 6:08.6 1:41:06.6P
Honolulu, Hawaii 34.75 6:51.5 1:41:49.5P
Ottawa, Canada 35.10 6:54.5 1:41:52.5P
Washington, D.C. 35.30 6:56.2 1:41:54.2P
Philadephia, Pennsylvania 36.45 7:06.0 1:42:04.0P
New York, New York 37.13 7:11.8 1:42:09.8P
Miami, Florida 37.91 7:18.4 1:42:16.4P
Boston, Massachusetts 38.91 7:26.8 1:42:24.8P
Bangor, Maine 40.06 7:36.4 1:42:34.4P
San Juan, Puerto Rico 52.77 9:16.3 1:44:14.3P
Lima, Peru 66.1410:48.8 1:45:46.8P
Bergen, Norway 72.4311:27.8 1:46:25.8P
Tokyo, Japan 73.8311:36.0 1:46:34.0P
London, England 77.0711:54.7 1:46:52.7P
Agana, Guam 83.6412:30.0 1:47:28.0P
Moscow, Russia 84.3912:33.8 1:47:31.8P
Beijing, China 84.8312:36.0 1:47:34.0P
Rome, Italy 89.9813:00.9 1:47:58.9P
Wellington, New Zealand 97.9213:37.1 1:48:35.1P
Brisbane, Australia 102.5413:57.6 1:48:55.6Pdiff
Kathmandu, Nepal 108.8814:25.8 1:49:23.8Pdiff
Palmer Station, Antarctica 114.9614:52.8 1:49:50.8Pdiff
Nairobi, Kenya 138.2616:36.2 1:51:34.2Pdiff

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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