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
Agana, Guam 16.68 3:54.122:59:20.1Pn
Brisbane, Australia 26.18 5:34.923:01:00.9P
Tokyo, Japan 38.72 7:24.423:02:50.4P
Wellington, New Zealand 47.74 8:37.223:04:03.2P
Beijing, China 49.11 8:47.823:04:13.8P
Kathmandu, Nepal 62.9810:27.223:05:53.2P
Honolulu, Hawaii 63.2310:28.823:05:54.8P
Anchorage, Alaska 82.1812:21.523:07:47.5P
Seattle, Washington 95.8213:26.823:08:52.8P
San Francisco, California 95.9413:27.323:08:53.3P
Los Angeles, California 99.4313:42.923:09:08.9Pdiff
Moscow, Russia 100.9413:49.623:09:15.6Pdiff
Phoenix, Arizona 104.6114:05.923:09:31.9Pdiff
Nairobi, Kenya 105.5814:10.223:09:36.2Pdiff
Palmer Station, Antarctica 106.7914:15.623:09:41.6Pdiff
Albuquerque, New Mexico 108.8514:24.723:09:50.7Pdiff
Golden, Colorado 109.0914:25.823:09:51.8Pdiff
Bergen, Norway 114.3114:48.923:10:14.9Pdiff
Wichita, Kansas 115.5414:54.423:10:20.4Pdiff
Duluth, Minnesota 115.9114:56.123:10:22.1Pdiff
Mexico City, Mexico 117.7315:04.123:10:30.1Pdiff
Brownsville, Texas 118.2615:06.523:10:32.5Pdiff
St. Louis, Missouri 120.4915:16.423:10:42.4Pdiff
Rome, Italy 121.0715:18.923:10:44.9Pdiff
London, England 122.6415:25.923:10:51.9Pdiff
Knoxville, Tennessee 125.2915:37.723:11:03.7Pdiff
Ottawa, Canada 126.2715:42.023:11:08.0Pdiff
Washington, D.C. 129.4415:56.123:11:22.1Pdiff
Philadelphia, Pennsylvania 130.0015:58.623:11:24.6Pdiff
New York, New York 130.2315:59.623:11:25.6Pdiff
Bangor, Maine 130.2615:59.823:11:25.8Pdiff
Boston, Massachusetts 130.8216:02.223:11:28.2Pdiff
Miami, Florida 133.2816:13.223:11:39.2Pdiff
Lima, Peru 137.8516:33.523:11:59.5Pdiff
San Juan, Puerto Rico 148.1119:43.623:15:09.6PKPdf

Travel Time Information and Calculator

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