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
Brisbane, Australia 19.40 4:26.117:23:57.1P
Wellington, New Zealand 30.73 6:15.217:25:46.2P
Agana, Guam 32.05 6:26.817:25:57.8P
Honolulu, Hawaii 49.02 8:46.817:28:17.8P
Tokyo, Japan 52.78 9:15.117:28:46.1P
Beijing, China 68.2811:01.117:30:32.1P
Anchorage, Alaska 80.8312:14.017:31:45.0P
San Francisco, California 83.6512:28.817:31:59.8P
Los Angeles, California 85.6912:39.117:32:10.1P
Kathmandu, Nepal 86.4312:42.717:32:13.7P
Seattle, Washington 87.2012:46.417:32:17.4P
Phoenix, Arizona 90.4913:02.017:32:33.0P
Palmer Station, Antarctica 93.3613:15.217:32:46.2P
Albuquerque, New Mexico 95.2413:23.817:32:54.8P
Golden, Colorado 97.1613:32.417:33:03.4P
Mexico City, Mexico 99.1813:41.517:33:12.4Pdiff
Brownsville, Texas 101.6413:52.317:33:23.3Pdiff
Wichita, Kansas 103.0313:58.517:33:29.5Pdiff
Duluth, Minnesota 107.1514:16.817:33:47.8Pdiff
St. Louis, Missouri 108.6414:23.417:33:54.4Pdiff
Knoxville, Tennessee 112.7314:41.617:34:12.6Pdiff
Lima, Peru 114.0014:47.217:34:18.2Pdiff
Miami, Florida 117.1915:01.417:34:32.4Pdiff
Ottawa, Canada 118.6515:07.917:34:38.9Pdiff
Washington, D.C. 118.9115:09.017:34:40.0Pdiff
Moscow, Russia 120.1015:14.317:34:45.3Pdiff
Philadelphia, Pennsylvania 120.1715:14.617:34:45.6Pdiff
New York, New York 120.8915:17.817:34:48.8Pdiff
Boston, Massachusetts 122.6515:25.617:34:56.6Pdiff
Bangor, Maine 123.5615:29.617:35:00.6Pdiff
Nairobi, Kenya 126.9615:44.817:35:15.8Pdiff
Bergen, Norway 129.0915:54.217:35:25.2Pdiff
San Juan, Puerto Rico 130.2515:59.417:35:30.4Pdiff
London, England 138.4816:35.917:36:06.9Pdiff
Rome, Italy 141.5016:49.317:36:20.3Pdiff

Travel Time Information and Calculator

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