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 21.03 4:43.913:32:52.9P
Wellington, New Zealand 31.12 6:18.613:34:27.6P
Agana, Guam 32.58 6:31.513:34:40.5P
Honolulu, Hawaii 47.21 8:32.813:36:41.8P
Tokyo, Japan 52.84 9:15.613:37:24.6P
Beijing, China 68.7411:04.013:39:13.0P
Anchorage, Alaska 79.4912:06.813:40:15.8P
San Francisco, California 81.8312:19.313:40:28.3P
Los Angeles, California 83.8412:29.713:40:38.7P
Seattle, Washington 85.4812:38.013:40:47.0P
Kathmandu, Nepal 87.5512:48.113:40:57.1P
Phoenix, Arizona 88.6312:53.213:41:02.2P
Albuquerque, New Mexico 93.3713:15.313:41:24.3P
Palmer Station, Antarctica 93.6213:16.413:41:25.4P
Golden, Colorado 95.3213:24.213:41:33.2P
Mexico City, Mexico 97.3113:33.113:41:42.1P
Brownsville, Texas 99.7413:43.913:41:52.9Pdiff
Wichita, Kansas 101.1713:50.313:41:59.3Pdiff
Duluth, Minnesota 105.3814:08.913:42:17.9Pdiff
St. Louis, Missouri 106.7914:15.213:42:24.2Pdiff
Knoxville, Tennessee 110.8714:33.313:42:42.3Pdiff
Lima, Peru 112.6214:41.113:42:50.1Pdiff
Miami, Florida 115.3014:53.013:43:02.0Pdiff
Ottawa, Canada 116.8815:00.013:43:09.0Pdiff
Washington, D.C. 117.0715:00.813:43:09.8Pdiff
Philadelphia, Pennsylvania 118.3415:06.513:43:15.5Pdiff
New York, New York 119.0715:09.713:43:18.7Pdiff
Moscow, Russia 120.3015:15.213:43:24.2Pdiff
Boston, Massachusetts 120.8515:17.613:43:26.6Pdiff
Bangor, Maine 121.8015:21.813:43:30.8Pdiff
San Juan, Puerto Rico 128.3915:51.113:44:00.1Pdiff
Bergen, Norway 128.6815:52.413:44:01.4Pdiff
Nairobi, Kenya 128.8015:52.913:44:01.9Pdiff
London, England 138.0916:34.213:44:43.2Pdiff
Rome, Italy 141.7516:50.413:44:59.4Pdiff

Travel Time Information and Calculator

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