Historic Earthquakes

Magnitude 7.6 TAIWAN
1999 September 20 17:47:18 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
Beijing, China 16.55 3:49.5 17:51:07.5 Pn
Tokyo, Japan 20.12 4:31.0 17:51:49.0 P
Agana, Guam 24.71 5:18.1 17:52:36.1 P
Kathmandu, Nepal 32.29 6:25.7 17:53:43.7 P
Brisbane, Australia 59.60 10:00.5 17:57:18.5 P
Moscow, Russia 66.97 10:49.4 17:58:07.4 P
Anchorage, Alaska 69.05 11:02.5 17:58:20.5 P
Honolulu, Hawaii 74.00 11:32.3 17:58:50.3 P
Bergen, Norway 81.33 12:13.1 17:59:31.1 P
Wellington, New Zealand 81.69 12:15.1 17:59:33.1 P
Nairobi, Kenya 85.15 12:32.8 17:59:50.8 P
Rome, Italy 87.15 12:42.7 18:00:00.7 P
Seattle, Washington 88.95 12:51.2 18:00:09.2 P
London, England 89.05 12:51.7 18:00:09.7 P
San Francisco, California 94.63 13:17.4 18:00:35.4 P
Los Angeles, California 99.55 13:39.5 18:00:57.5 Pdiff
Golden, Colorado 103.53 13:57.1 18:01:15.1 Pdiff
Duluth, Minnesota 103.69 13:57.8 18:01:15.8 Pdiff
Albuquerque, New Mexico 106.10 14:08.6 18:01:26.6 Pdiff
Wichita, Kansas 108.99 14:21.4 18:01:39.4 Pdiff
Ottawa, Canada 109.49 14:23.6 18:01:41.6 Pdiff
Bangor, Maine 111.19 14:31.2 18:01:49.2 Pdiff
St. Louis, Missouri 111.35 14:31.8 18:01:49.8 Pdiff
Boston, Massachusetts 113.30 14:40.5 18:01:58.5 Pdiff
New York, New York 114.36 14:45.2 18:02:03.2 Pdiff
Philadelphia, Pennsylvania 114.85 14:47.4 18:02:05.4 Pdiff
Washington, D.C. 115.43 14:50.0 18:02:08.0 Pdiff
Knoxville, Tennessee 115.67 14:51.0 18:02:09.0 Pdiff
Brownsville, Texas 118.16 15:02.1 18:02:20.1 Pdiff
Mexico City, Mexico 121.91 15:18.7 18:02:36.7 Pdiff
Miami, Florida 126.67 15:39.9 18:02:57.9 Pdiff
Palmer Station, Antarctica 135.88 16:20.7 18:03:38.7 Pdiff
San Juan, Puerto Rico 137.44 16:27.7 18:03:45.7 Pdiff
Lima, Peru 159.32 19:54.2 18:07:12.2 PKPdf