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Earthquake Hazards Program


Monday, August 10, 2009 at 19:55:40 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 15.35 3:34.119:59:13.1Pn
Beijing, China 33.04 6:32.220:02:11.2P
Tokyo, Japan 47.13 8:28.820:04:07.8P
Agana, Guam 50.27 8:52.920:04:31.9P
Nairobi, Kenya 57.58 9:46.420:05:25.4P
Moscow, Russia 59.24 9:58.020:05:37.0P
Brisbane, Australia 71.3611:16.620:06:55.6P
Rome, Italy 73.7011:30.520:07:09.5P
Bergen, Norway 76.7611:48.120:07:27.1P
London, England 81.0812:11.820:07:50.8P
Anchorage, Alaska 90.2412:57.220:08:36.2P
Wellington, New Zealand 93.1313:10.520:08:49.5P
Honolulu, Hawaii 102.2113:51.320:09:30.3Pdiff
Seattle, Washington 110.9114:29.920:10:08.9Pdiff
San Francisco, California 118.7415:04.620:10:43.6Pdiff
Bangor, Maine 119.1615:06.520:10:45.5Pdiff
Duluth, Minnesota 119.3615:07.420:10:46.4Pdiff
Ottawa, Canada 119.9715:10.120:10:49.1Pdiff
Boston, Massachusetts 122.0415:19.320:10:58.3Pdiff
Los Angeles, California 123.7515:26.920:11:05.9Pdiff
Golden, Colorado 123.9215:27.720:11:06.7Pdiff
Palmer Station, Antarctica 124.2215:29.020:11:08.0Pdiff
New York, New York 124.2315:29.020:11:08.0Pdiff
Philadelphia, Pennsylvania 125.1915:33.320:11:12.3Pdiff
Washington, D.C. 126.5515:39.320:11:18.3Pdiff
Phoenix, Arizona 127.1315:41.920:11:20.9Pdiff
St. Louis, Missouri 127.5215:43.620:11:22.6Pdiff
Wichita, Kansas 127.6115:44.020:11:23.0Pdiff
Albuquerque, New Mexico 127.7815:44.820:11:23.8Pdiff
Knoxville, Tennessee 130.2915:55.920:11:34.9Pdiff
Brownsville, Texas 139.0616:34.920:12:13.9Pdiff
Miami, Florida 139.9016:38.620:12:17.6Pdiff
San Juan, Puerto Rico 141.6816:46.520:12:25.5Pdiff
Mexico City, Mexico 144.7216:60.020:12:39.0Pdiff
Lima, Peru 170.0420:06.020:15:45.0PKPdf

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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