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 20.04 4:33.220:56:25.2P
Wellington, New Zealand 31.46 6:21.620:58:13.6P
Agana, Guam 31.49 6:21.920:58:13.9P
Honolulu, Hawaii 48.49 8:42.821:00:34.8P
Tokyo, Japan 52.11 9:10.221:01:02.2P
Beijing, China 67.7110:57.521:02:49.5P
Anchorage, Alaska 80.1112:10.221:04:02.2P
San Francisco, California 83.1412:26.221:04:18.2P
Los Angeles, California 85.2312:36.821:04:28.8P
Kathmandu, Nepal 86.0912:41.021:04:33.0P
Seattle, Washington 86.6012:43.521:04:35.5P
Phoenix, Arizona 90.0512:59.921:04:51.9P
Palmer Station, Antarctica 94.0713:18.521:05:10.5P
Albuquerque, New Mexico 94.7913:21.721:05:13.7P
Golden, Colorado 96.6613:30.221:05:22.2P
Mexico City, Mexico 98.9213:40.321:05:32.3Pdiff
Brownsville, Texas 101.3013:50.921:05:42.9Pdiff
Wichita, Kansas 102.5513:56.421:05:48.4Pdiff
Duluth, Minnesota 106.5914:14.321:06:06.3Pdiff
St. Louis, Missouri 108.1614:21.321:06:13.3Pdiff
Knoxville, Tennessee 112.2814:39.621:06:31.6Pdiff
Lima, Peru 114.2214:48.221:06:40.2Pdiff
Miami, Florida 116.8714:60.021:06:52.0Pdiff
Ottawa, Canada 118.0915:05.421:06:57.4Pdiff
Washington, D.C. 118.4215:06.921:06:58.9Pdiff
Moscow, Russia 119.4715:11.521:07:03.5Pdiff
Philadelphia, Pennsylvania 119.6615:12.421:07:04.4Pdiff
New York, New York 120.3715:15.521:07:07.5Pdiff
Boston, Massachusetts 122.1115:23.221:07:15.2Pdiff
Bangor, Maine 122.9915:27.121:07:19.1Pdiff
Nairobi, Kenya 127.1315:45.521:07:37.5Pdiff
Bergen, Norway 128.3615:51.021:07:43.0Pdiff
San Juan, Puerto Rico 130.0315:58.421:07:50.4Pdiff
London, England 137.7516:32.721:08:24.7Pdiff
Rome, Italy 140.8816:46.621:08:38.6Pdiff

Travel Time Information and Calculator

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