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Earthquake Hazards Program


Wednesday, October 24, 2007 at 21:02:50 UTC

Theoretical P-Wave Travel Times

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
Travel Time
Arrival Time
Kathmandu, Nepal 34.90 6:48.721:09:39.7P
Beijing, China 45.84 8:19.121:11:10.1P
Agana, Guam 46.67 8:25.721:11:16.7P
Tokyo, Japan 53.50 9:17.521:12:08.5P
Brisbane, Australia 54.73 9:26.421:12:17.4P
Nairobi, Kenya 64.2010:31.921:13:22.9P
Wellington, New Zealand 75.2111:39.721:14:30.7P
Moscow, Russia 78.6311:59.021:14:50.0P
Rome, Italy 91.5113:03.521:15:54.5P
Bergen, Norway 96.2113:25.021:16:16.0P
London, England 100.0413:42.121:16:33.1Pdiff
Honolulu, Hawaii 101.7513:49.721:16:40.7Pdiff
Anchorage, Alaska 102.5213:53.121:16:44.1Pdiff
Palmer Station, Antarctica 107.7114:16.221:17:07.2Pdiff
Seattle, Washington 122.6115:22.321:18:13.3Pdiff
San Francisco, California 127.9515:46.021:18:37.0Pdiff
Los Angeles, California 132.7516:07.321:18:58.3Pdiff
Duluth, Minnesota 135.8116:20.921:19:11.9Pdiff
Golden, Colorado 137.1416:26.821:19:17.8Pdiff
Phoenix, Arizona 137.3716:27.821:19:18.8Pdiff
Bangor, Maine 138.3116:32.021:19:23.0Pdiff
Ottawa, Canada 138.5716:33.121:19:24.1Pdiff
Albuquerque, New Mexico 139.7616:38.421:19:29.4Pdiff
Boston, Massachusetts 141.1116:44.421:19:35.4Pdiff
Wichita, Kansas 142.3416:49.921:19:40.9Pdiff
New York, New York 143.1016:53.221:19:44.2Pdiff
St. Louis, Missouri 143.9116:56.821:19:47.8Pdiff
Philadephia, Pennsylvania 143.9616:57.121:19:48.1Pdiff
Washington, D.C. 145.1419:33.221:22:24.2PKPbc
Knoxville, Tennessee 147.6119:38.021:22:29.0PKPdf
Brownsville, Texas 151.8119:44.621:22:35.6PKPdf
Mexico City, Mexico 154.9619:49.121:22:40.1PKPdf
Miami, Florida 158.2419:53.421:22:44.4PKPdf
San Juan, Puerto Rico 160.8519:56.421:22:47.4PKPdf
Lima, Peru 163.9919:59.621:22:50.6PKPdf

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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