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Earthquake Hazards Program


Wednesday, September 12, 2007 at 23:49:04 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 33.67 6:41.023:55:40.0P
Beijing, China 44.74 8:13.323:57:12.3P
Agana, Guam 46.45 8:26.923:57:25.9P
Tokyo, Japan 52.72 9:14.723:58:13.7P
Brisbane, Australia 55.59 9:35.723:58:34.7P
Nairobi, Kenya 63.9410:33.223:59:32.2P
Wellington, New Zealand 76.2211:48.6 0:00:47.6P
Moscow, Russia 77.4411:55.5 0:00:54.5P
Rome, Italy 90.4913:02.0 0:02:01.0P
Bergen, Norway 95.0213:22.8 0:02:21.8P
London, England 98.9113:40.3 0:02:39.3Pdiff
Anchorage, Alaska 101.5513:52.0 0:02:51.0Pdiff
Honolulu, Hawaii 101.5513:52.0 0:02:51.0Pdiff
Palmer Station, Antarctica 108.9114:24.6 0:03:23.6Pdiff
Seattle, Washington 121.7215:21.5 0:04:20.5Pdiff
San Francisco, California 127.2415:46.0 0:04:45.0Pdiff
Los Angeles, California 132.0716:07.4 0:05:06.4Pdiff
Duluth, Minnesota 134.6716:19.0 0:05:18.0Pdiff
Golden, Colorado 136.1916:25.8 0:05:24.8Pdiff
Phoenix, Arizona 136.6216:27.7 0:05:26.7Pdiff
Bangor, Maine 137.0516:29.6 0:05:28.6Pdiff
Ottawa, Canada 137.3216:30.8 0:05:29.8Pdiff
Albuquerque, New Mexico 138.9116:37.8 0:05:36.8Pdiff
Boston, Massachusetts 139.8516:42.0 0:05:41.0Pdiff
Wichita, Kansas 141.3216:48.5 0:05:47.5Pdiff
New York, New York 141.8416:50.8 0:05:49.8Pdiff
Philadephia, Pennsylvania 142.7116:54.7 0:05:53.7Pdiff
St. Louis, Missouri 142.7816:55.0 0:05:54.0Pdiff
Washington, D.C. 143.9016:59.9 0:05:58.9Pdiff
Knoxville, Tennessee 146.4319:39.3 0:08:38.3PKPdf
Brownsville, Texas 150.9719:46.5 0:08:45.5PKPdf
Mexico City, Mexico 154.3519:51.5 0:08:50.5PKPdf
Miami, Florida 157.0219:55.1 0:08:54.1PKPdf
San Juan, Puerto Rico 159.7319:58.4 0:08:57.4PKPdf
Lima, Peru 165.1720:03.9 0:09:02.9PKPdf

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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