Historic Earthquakes

Magnitude 5.2 Pennsylvania
1998 September 25 19:52:52 UTC

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
(degrees)
Travel Time
(min:secs)
Arrival Time
UTC
Phase
Tokyo, Japan 24.58 5:16.911:32:10.9P
Washington, D.C. 3.64 0:57.019:53:49.0Pn
Philadelphia, Pennsylvania 4.25 1:05.419:53:57.4Pn
New York, New York 4.88 1:14.019:54:06.0Pn
Ottawa, Canada 5.19 1:18.319:54:10.3Pn
Knoxville, Tennessee 6.68 1:38.719:54:30.7Pn
Boston, Massachusetts 6.99 1:43.019:54:35.0Pn
St. Louis, Missouri 8.08 1:57.919:54:49.9Pn
Bangor, Maine 9.11 2:12.119:55:04.1Pn
Duluth, Minnesota 9.97 2:23.919:55:15.9Pn
Wichita, Kansas 13.59 3:13.319:56:05.3Pn
Miami, Florida 15.68 3:41.619:56:33.6Pn
Golden, Colorado 18.91 4:21.519:57:13.5P
Brownsville, Texas 21.03 4:44.519:57:36.5P
Albuquerque, New Mexico 21.53 4:50.019:57:42.0P
San Juan, Puerto Rico 25.97 5:33.419:58:25.4P
Mexico City, Mexico 27.20 5:44.619:58:36.6P
Seattle, Washington 30.21 6:11.419:59:03.4P
Los Angeles, California 30.65 6:15.319:59:07.3P
San Francisco, California 32.36 6:30.319:59:22.3P
Anchorage, Alaska 45.19 8:17.720:01:09.7P
Bergen, Norway 53.08 9:18.220:02:10.2P
Lima, Peru 53.40 9:20.520:02:12.5P
London, England 53.49 9:21.220:02:13.2P
Rome, Italy 65.7510:45.820:03:37.8P
Honolulu, Hawaii 67.0110:53.920:03:45.9P
Moscow, Russia 69.8611:11.820:04:03.8P
Tokyo, Japan 94.8613:22.920:06:14.9P
Beijing, China 97.5513:35.120:06:27.1P
Palmer Station, Antarctica 109.6314:28.720:07:20.7Pdiff
Kathmandu, Nepal 109.9114:29.920:07:21.9Pdiff
Nairobi, Kenya 110.9914:34.720:07:26.7Pdiff
Agana, Guam 111.2814:36.020:07:28.0Pdiff
Wellington, New Zealand 125.3615:38.520:08:30.5Pdiff
Brisbane, Australia 134.5216:19.220:09:11.2Pdiff