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 0.80 0:18.517:22:05.5Pn
Miami, Florida 15.58 3:33.817:25:20.8Pn
Washington, D.C. 22.75 4:53.717:26:40.7P
Philadelphia, Pennsylvania 23.02 4:56.217:26:43.2P
New York, New York 23.38 4:59.517:26:46.5P
Boston, Massachusetts 24.27 5:07.617:26:54.6P
Knoxville, Tennessee 24.71 5:11.617:26:58.6P
Bangor, Maine 26.39 5:26.817:27:13.8P
Ottawa, Canada 28.22 5:43.117:27:30.1P
St. Louis, Missouri 29.58 5:55.217:27:42.2P
Brownsville, Texas 30.66 6:04.717:27:51.7P
Mexico City, Mexico 32.03 6:16.717:28:03.7P
Lima, Peru 32.53 6:21.117:28:08.1P
Wichita, Kansas 33.93 6:33.217:28:20.2P
Duluth, Minnesota 35.81 6:49.417:28:36.4P
Albuquerque, New Mexico 40.12 7:25.517:29:12.5P
Golden, Colorado 40.36 7:27.517:29:14.5P
Phoenix, Arizona 44.25 7:59.117:29:46.1P
Los Angeles, California 49.43 8:39.417:30:26.4P
San Francisco, California 53.10 9:06.817:30:53.8P
Seattle, Washington 54.48 9:16.917:31:03.9P
London, England 60.29 9:57.817:31:44.8P
Bergen, Norway 64.5310:26.017:32:13.0P
Rome, Italy 68.9310:54.017:32:41.0P
Anchorage, Alaska 71.4011:09.117:32:56.1P
Moscow, Russia 81.9912:08.617:33:55.6P
Honolulu, Hawaii 85.7212:27.617:34:14.6P
Palmer Station, Antarctica 86.0112:29.017:34:16.0P
Nairobi, Kenya 101.9013:41.817:35:28.8Pdiff
Tokyo, Japan 121.1515:07.217:36:54.2Pdiff
Beijing, China 121.8815:10.417:36:57.4Pdiff
Wellington, New Zealand 124.3315:21.317:37:08.3Pdiff
Kathmandu, Nepal 125.9815:28.617:37:15.6Pdiff
Agana, Guam 136.5816:15.717:38:02.7Pdiff
Brisbane, Australia 143.7516:47.517:38:34.5Pdiff

Travel Time Information and Calculator

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