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
San Juan, Puerto Rico 1.63 0:26.220:32:29.2Pn
Miami, Florida 15.97 3:41.720:35:44.7Pn
Washington, D.C. 22.59 4:57.020:36:60.0P
Philadelphia, Pennsylvania 22.79 4:59.120:37:02.1P
New York, New York 23.10 5:02.420:37:05.4P
Boston, Massachusetts 23.90 5:10.020:37:13.0P
Knoxville, Tennessee 24.82 5:18.420:37:21.4P
Bangor, Maine 25.95 5:28.720:37:31.7P
Ottawa, Canada 27.92 5:46.420:37:49.4P
St. Louis, Missouri 29.69 6:02.120:38:05.1P
Brownsville, Texas 31.19 6:15.320:38:18.3P
Mexico City, Mexico 32.70 6:28.620:38:31.6P
Lima, Peru 33.30 6:33.820:38:36.8P
Wichita, Kansas 34.14 6:41.120:38:44.1P
Duluth, Minnesota 35.76 6:55.120:38:58.1P
Albuquerque, New Mexico 40.46 7:34.620:39:37.6P
Golden, Colorado 40.59 7:35.720:39:38.7P
Phoenix, Arizona 44.65 8:08.620:40:11.6P
Los Angeles, California 49.82 8:48.920:40:51.9P
San Francisco, California 53.43 9:15.820:41:18.8P
Seattle, Washington 54.62 9:24.520:41:27.5P
London, England 59.41 9:58.520:42:01.5P
Bergen, Norway 63.7010:27.420:42:30.4P
Rome, Italy 68.0210:55.320:42:58.3P
Anchorage, Alaska 71.3211:15.620:43:18.6P
Moscow, Russia 81.1412:11.420:44:14.4P
Honolulu, Hawaii 86.2212:37.320:44:40.3P
Palmer Station, Antarctica 86.5312:38.920:44:41.9P
Nairobi, Kenya 101.1413:45.820:45:48.8Pdiff
Tokyo, Japan 120.9615:13.720:47:16.7Pdiff
Beijing, China 121.3715:15.620:47:18.6Pdiff
Kathmandu, Nepal 125.1315:32.320:47:35.3Pdiff
Wellington, New Zealand 125.2415:32.720:47:35.8Pdiff
Agana, Guam 136.7216:23.720:48:26.7Pdiff
Brisbane, Australia 144.6316:58.820:49:01.8Pdiff

Travel Time Information and Calculator

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