Theoretical P-Wave Travel Times

Magnitude 4.6 TONGA
Sunday, January 20, 2013 at 13:47:39 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
Wellington, New Zealand 26.46 5:37.113:53:17.1P
Brisbane, Australia 32.74 6:32.813:54:12.8P
Honolulu, Hawaii 40.82 7:41.513:55:21.5P
Agana, Guam 51.02 9:02.013:56:42.0P
Tokyo, Japan 68.3911:01.813:58:41.8P
San Francisco, California 72.4011:26.313:59:06.3P
Los Angeles, California 72.9111:29.413:59:09.4P
Phoenix, Arizona 76.9311:52.613:59:32.6P
Seattle, Washington 78.8412:03.313:59:43.3P
Anchorage, Alaska 79.9612:09.313:59:49.3P
Mexico City, Mexico 81.3912:17.013:59:57.0P
Albuquerque, New Mexico 81.6612:18.413:59:58.4P
Palmer Station, Antarctica 81.7512:18.913:59:58.9P
Golden, Colorado 84.7912:34.514:00:14.5P
Brownsville, Texas 85.1512:36.414:00:16.4P
Beijing, China 86.0912:41.114:00:21.1P
Wichita, Kansas 89.6012:57.814:00:37.8P
Lima, Peru 92.6113:11.714:00:51.7P
St. Louis, Missouri 95.1613:23.414:01:03.4P
Duluth, Minnesota 96.2313:28.314:01:08.3P
Knoxville, Tennessee 98.3213:37.614:01:17.6P
Miami, Florida 100.0013:45.114:01:25.1Pdiff
Washington, D.C. 105.2514:08.414:01:48.4Pdiff
Philadelphia, Pennsylvania 106.8514:15.514:01:55.5Pdiff
Ottawa, Canada 107.1314:16.714:01:56.7Pdiff
Kathmandu, Nepal 107.3014:17.514:01:57.5Pdiff
New York, New York 107.8214:19.814:01:59.8Pdiff
Boston, Massachusetts 110.1714:30.214:02:10.2Pdiff
San Juan, Puerto Rico 111.1914:34.814:02:14.8Pdiff
Bangor, Maine 111.9914:38.314:02:18.3Pdiff
Moscow, Russia 134.4016:17.814:03:57.8Pdiff
Bergen, Norway 136.4216:26.814:04:06.8Pdiff
London, England 144.9317:04.514:04:44.5Pdiff
Nairobi, Kenya 145.1319:36.414:07:16.4PKPbc
Rome, Italy 154.4319:53.214:07:33.2PKPdf

Travel Time Information and Calculator

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