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Earthquake Hazards Program

Magnitude 4.9 OFFSHORE NORTHERN CALIFORNIA

2008 October 26 09:27:21 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 3.07 0:47.6 9:28:08.6Pn
Seattle, Washington 7.66 1:50.6 9:29:11.6Pn
Los Angeles, California 8.07 1:56.2 9:29:17.2Pn
Phoenix, Arizona 12.17 2:52.4 9:30:13.4Pn
Golden, Colorado 14.91 3:29.7 9:30:50.7Pn
Albuquerque, New Mexico 15.18 3:33.3 9:30:54.3Pn
Wichita, Kansas 21.33 4:45.9 9:32:06.9P
Duluth, Minnesota 24.29 5:16.1 9:32:37.1P
Anchorage, Alaska 26.02 5:31.9 9:32:52.9P
St. Louis, Missouri 26.50 5:36.2 9:32:57.2P
Brownsville, Texas 26.77 5:38.6 9:32:59.6P
Mexico City, Mexico 30.18 6:09.0 9:33:30.0P
Knoxville, Tennessee 31.18 6:17.8 9:33:38.8P
Honolulu, Hawaii 33.95 6:42.1 9:34:03.1P
Ottawa, Canada 35.77 6:57.8 9:34:18.8P
Washington, D.C. 36.36 7:02.8 9:34:23.8P
Philadephia, Pennsylvania 37.43 7:11.9 9:34:32.9P
New York, New York 38.06 7:17.2 9:34:38.2P
Miami, Florida 39.58 7:29.9 9:34:50.9P
Boston, Massachusetts 39.72 7:31.1 9:34:52.1P
Bangor, Maine 40.72 7:39.3 9:35:00.3P
San Juan, Puerto Rico 54.40 9:25.7 9:36:46.7P
Lima, Peru 68.2710:59.7 9:38:20.7P
Bergen, Norway 71.6211:20.3 9:38:41.3P
Tokyo, Japan 71.7511:21.0 9:38:42.1P
London, England 76.5611:49.1 9:39:10.1P
Agana, Guam 81.8812:18.2 9:39:39.2P
Beijing, China 82.6812:22.4 9:39:43.4P
Moscow, Russia 83.1312:24.7 9:39:45.7P
Rome, Italy 89.4312:55.6 9:40:16.6P
Wellington, New Zealand 98.0713:35.1 9:40:56.1P
Brisbane, Australia 101.8713:52.0 9:41:13.0Pdiff
Kathmandu, Nepal 106.8314:14.0 9:41:35.0Pdiff
Palmer Station, Antarctica 116.9414:58.9 9:42:19.9Pdiff
Nairobi, Kenya 137.6616:30.8 9:43:51.8Pdiff

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


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