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 19.87 4:25.317:53:16.3P
Brisbane, Australia 21.63 4:44.217:53:35.2P
Wellington, New Zealand 41.94 7:43.417:56:34.4P
Tokyo, Japan 42.42 7:47.317:56:38.3P
Beijing, China 54.71 9:21.717:58:12.7P
Honolulu, Hawaii 58.89 9:51.317:58:42.3P
Kathmandu, Nepal 69.9311:03.417:59:54.4P
Anchorage, Alaska 81.9712:11.918:01:02.9P
San Francisco, California 92.6313:03.618:01:54.6P
Seattle, Washington 93.6413:08.218:01:59.2P
Los Angeles, California 95.7213:17.718:02:08.7P
Phoenix, Arizona 100.8413:40.518:02:31.5Pdiff
Palmer Station, Antarctica 102.7013:48.818:02:39.8Pdiff
Albuquerque, New Mexico 105.3014:00.318:02:51.3Pdiff
Golden, Colorado 106.0814:03.818:02:54.8Pdiff
Moscow, Russia 106.8914:07.418:02:58.4Pdiff
Nairobi, Kenya 111.8114:29.218:03:20.2Pdiff
Wichita, Kansas 112.4414:32.018:03:23.0Pdiff
Mexico City, Mexico 112.6514:32.918:03:23.9Pdiff
Brownsville, Texas 113.8414:38.218:03:29.2Pdiff
Duluth, Minnesota 114.0314:39.118:03:30.1Pdiff
St. Louis, Missouri 117.6914:55.318:03:46.3Pdiff
Bergen, Norway 119.2915:02.418:03:53.4Pdiff
Knoxville, Tennessee 122.3415:16.018:04:07.0Pdiff
Ottawa, Canada 124.9815:27.718:04:18.7Pdiff
Washington, D.C. 127.2615:37.818:04:28.8Pdiff
Rome, Italy 127.4615:38.718:04:29.7Pdiff
London, England 128.0015:41.118:04:32.1Pdiff
Philadelphia, Pennsylvania 128.0715:41.418:04:32.4Pdiff
New York, New York 128.4715:43.218:04:34.2Pdiff
Miami, Florida 129.2515:46.618:04:37.6Pdiff
Bangor, Maine 129.3815:47.218:04:38.2Pdiff
Boston, Massachusetts 129.4715:47.618:04:38.6Pdiff
Lima, Peru 130.8515:53.718:04:44.7Pdiff
San Juan, Puerto Rico 143.6916:50.718:05:41.7Pdiff

Travel Time Information and Calculator

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