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Earthquake Hazards Program

Magnitude 6.1 COSTA RICA

Thursday, January 08, 2009 at 19:21:34 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
Miami, Florida 15.94 3:41.619:25:20.6Pn
Mexico City, Mexico 17.07 3:55.819:25:34.8Pn
San Juan, Puerto Rico 19.37 4:22.619:26:01.6P
Brownsville, Texas 20.03 4:29.819:26:08.8P
Lima, Peru 23.29 5:04.719:26:43.7P
Knoxville, Tennessee 25.63 5:26.219:27:05.2P
St. Louis, Missouri 28.84 5:55.019:27:34.0P
Washington, D.C. 29.28 5:58.919:27:37.9P
Wichita, Kansas 29.85 6:04.019:27:43.0P
Philadephia, Pennsylvania 30.70 6:11.419:27:50.4P
New York, New York 31.70 6:20.219:27:59.2P
Albuquerque, New Mexico 32.08 6:23.619:28:02.6P
Boston, Massachusetts 34.01 6:40.419:28:19.4P
Phoenix, Arizona 34.46 6:44.319:28:23.3P
Golden, Colorado 34.82 6:47.419:28:26.4P
Ottawa, Canada 35.84 6:56.119:28:35.1P
Bangor, Maine 36.96 7:05.619:28:44.6P
Duluth, Minnesota 37.03 7:06.319:28:45.3P
Los Angeles, California 39.12 7:23.919:29:02.9P
San Francisco, California 43.89 8:02.919:29:41.9P
Seattle, Washington 49.26 8:45.019:30:24.0P
Anchorage, Alaska 69.4811:04.819:32:43.8P
Honolulu, Hawaii 71.1511:15.119:32:54.1P
London, England 78.4111:57.119:33:36.1P
Palmer Station, Antarctica 79.1212:01.019:33:40.0P
Bergen, Norway 81.0012:11.119:33:50.1P
Rome, Italy 88.2412:47.519:34:26.5P
Moscow, Russia 98.5913:34.919:35:13.9Pdiff
Wellington, New Zealand 104.8814:02.919:35:41.9Pdiff
Tokyo, Japan 118.3215:02.519:36:41.5Pdiff
Nairobi, Kenya 120.8015:13.519:36:52.5Pdiff
Brisbane, Australia 123.6415:26.119:37:05.1Pdiff
Agana, Guam 125.9815:36.519:37:15.5Pdiff
Beijing, China 126.5715:39.119:37:18.1Pdiff
Kathmandu, Nepal 140.9916:43.119:38:22.1Pdiff

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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