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Earthquake Hazards Program

Theoretical P-Wave Travel Times

2004 April 05 21:24:04 UTC

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

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 14.92 3:21.321:27:26.3Pn
Moscow, Russia 29.67 5:47.321:29:52.3P
Beijing, China 35.55 6:38.321:30:43.2P
Rome, Italy 44.95 7:55.321:32:00.3P
Bergen, Norway 47.29 8:13.521:32:18.5P
Nairobi, Kenya 49.21 8:28.221:32:33.2P
London, England 51.38 8:44.421:32:49.4P
Tokyo, Japan 54.42 9:06.721:33:11.7P
Agana, Guam 69.0910:44.721:34:49.7P
Anchorage, Alaska 77.1111:31.721:35:36.7P
Bangor, Maine 91.3112:43.221:36:48.2P
Ottawa, Canada 93.1512:51.621:36:56.6P
Boston, Massachusetts 94.2912:56.821:37:01.8P
Seattle, Washington 95.2713:01.321:37:06.3P
Duluth, Minnesota 95.8013:03.721:37:08.7P
New York, New York 96.7713:08.021:37:13.0P
Philadephia, Pennsylvania 97.8513:12.821:37:17.8Pdiff
Washington, D.C. 99.4413:19.921:37:24.9Pdiff
Brisbane, Australia 99.8813:21.921:37:26.9Pdiff
St. Louis, Missouri 103.2713:36.921:37:41.9Pdiff
Golden, Colorado 104.0813:40.521:37:45.5Pdiff
Knoxville, Tennessee 104.6413:43.021:37:48.0Pdiff
San Francisco, California 105.0913:45.021:37:50.0Pdiff
Wichita, Kansas 105.3613:46.221:37:51.2Pdiff
Honolulu, Hawaii 106.2913:50.321:37:55.3Pdiff
Albuquerque, New Mexico 108.7914:01.421:38:06.4Pdiff
Los Angeles, California 109.3214:03.721:38:08.7Pdiff
San Juan, Puerto Rico 112.0014:15.721:38:20.7Pdiff
Miami, Florida 112.4214:17.521:38:22.5Pdiff
Brownsville, Texas 117.0414:38.021:38:43.0Pdiff
Wellington, New Zealand 122.2215:01.021:39:06.0Pdiff
Mexico City, Mexico 123.6615:07.421:39:12.4Pdiff
Palmer Station, Antarctica 139.8616:19.321:40:24.3Pdiff
Lima, Peru 142.4216:30.721:40:35.7Pdiff
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