Theoretical P-Wave Travel Times

Magnitude 5.1 OFFSHORE NORTHERN CALIFORNIA
2012 July 21 01:52:01 UTC

Theoretical P-wave Travel Times

This map shows 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 3.56 0:56.2 1:52:55.2Pn
Seattle, Washington 7.72 1:53.4 1:53:52.4Pn
Los Angeles, California 8.59 2:05.2 1:54:04.2Pn
Phoenix, Arizona 12.78 3:02.7 1:55:01.7Pn
Golden, Colorado 15.55 3:40.2 1:55:39.2Pn
Albuquerque, New Mexico 15.83 3:43.9 1:55:42.9Pn
Wichita, Kansas 21.98 4:55.1 1:56:54.1P
Duluth, Minnesota 24.83 5:23.5 1:57:22.5P
Anchorage, Alaska 25.63 5:30.7 1:57:29.7P
St. Louis, Missouri 27.13 5:44.3 1:57:43.3P
Brownsville, Texas 27.40 5:46.8 1:57:45.8P
Mexico City, Mexico 30.76 6:16.6 1:58:15.6P
Knoxville, Tennessee 31.81 6:25.9 1:58:24.9P
Honolulu, Hawaii 33.40 6:39.8 1:58:38.8P
Ottawa, Canada 36.32 7:04.9 1:59:03.9P
Washington, D.C. 36.97 7:10.4 1:59:09.4P
Philadelphia, Pennsylvania 38.03 7:19.4 1:59:18.4P
New York, New York 38.65 7:24.6 1:59:23.6P
Miami, Florida 40.24 7:37.9 1:59:36.9P
Boston, Massachusetts 40.29 7:38.3 1:59:37.3P
Bangor, Maine 41.26 7:46.3 1:59:45.3P
San Juan, Puerto Rico 55.05 9:33.0 2:01:32.0P
Lima, Peru 68.8411:05.9 2:03:04.9P
Tokyo, Japan 71.1411:20.0 2:03:19.0P
Bergen, Norway 71.7911:23.9 2:03:22.9P
London, England 76.8211:53.2 2:03:52.2P
Agana, Guam 81.2312:17.4 2:04:16.4P
Beijing, China 82.1712:22.3 2:04:21.3P
Moscow, Russia 83.1512:27.4 2:04:26.4P
Rome, Italy 89.6712:59.4 2:04:58.4P
Wellington, New Zealand 97.7213:36.2 2:05:35.2P
Brisbane, Australia 101.3313:52.2 2:05:51.2Pdiff
Kathmandu, Nepal 106.4314:14.9 2:06:13.9Pdiff
Palmer Station, Antarctica 117.2815:03.0 2:07:02.0Pdiff
Nairobi, Kenya 137.8716:34.5 2:08:33.5Pdiff

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