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Earthquake Hazards Program


Monday, August 20, 2007 at 13:46:17 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
Agana, Guam 18.55 4:16.813:50:34.8P
Tokyo, Japan 31.50 6:22.013:52:40.0P
Beijing, China 35.06 6:52.913:53:10.9P
Brisbane, Australia 41.58 7:47.713:54:05.7P
Kathmandu, Nepal 45.32 8:18.013:54:36.0P
Wellington, New Zealand 64.0210:33.713:56:51.7P
Honolulu, Hawaii 73.6011:33.413:57:51.4P
Anchorage, Alaska 81.1312:15.613:58:33.6P
Moscow, Russia 84.8312:34.713:58:52.7P
Nairobi, Kenya 90.7313:03.013:59:21.0P
Seattle, Washington 98.8513:39.913:59:57.9Pdiff
Bergen, Norway 99.8113:44.214:00:02.2Pdiff
San Francisco, California 101.9313:53.714:00:11.7Pdiff
Rome, Italy 104.0314:03.014:00:21.0Pdiff
Los Angeles, California 106.3214:13.114:00:31.1Pdiff
London, England 107.2514:17.214:00:35.2Pdiff
Phoenix, Arizona 111.3314:35.414:00:53.4Pdiff
Golden, Colorado 113.4414:44.714:01:02.7Pdiff
Albuquerque, New Mexico 114.7114:50.414:01:08.4Pdiff
Duluth, Minnesota 116.7414:59.414:01:17.4Pdiff
Palmer Station, Antarctica 117.9615:04.814:01:22.8Pdiff
Wichita, Kansas 119.6615:12.414:01:30.4Pdiff
St. Louis, Missouri 123.3815:28.814:01:46.8Pdiff
Ottawa, Canada 124.6615:34.614:01:52.6Pdiff
Brownsville, Texas 126.0215:40.614:01:58.6Pdiff
Bangor, Maine 127.2615:46.114:02:04.1Pdiff
Mexico City, Mexico 127.5815:47.514:02:05.5Pdiff
Knoxville, Tennessee 128.1615:50.114:02:08.1Pdiff
Boston, Massachusetts 128.9115:53.414:02:11.4Pdiff
New York, New York 129.4015:55.614:02:13.6Pdiff
Philadephia, Pennsylvania 129.6415:56.614:02:14.6Pdiff
Washington, D.C. 129.7915:57.314:02:15.3Pdiff
Miami, Florida 138.4816:35.914:02:53.9Pdiff
San Juan, Puerto Rico 152.1319:48.314:06:06.3PKPdf
Lima, Peru 155.1219:52.614:06:10.6PKPdf

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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