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 16.66 3:52.613:50:37.6Pn
Brisbane, Australia 26.03 5:32.113:52:17.1P
Tokyo, Japan 38.77 7:23.313:54:08.3P
Wellington, New Zealand 47.53 8:34.113:55:19.1P
Beijing, China 49.29 8:47.713:55:32.7P
Honolulu, Hawaii 62.9210:25.313:57:10.3P
Kathmandu, Nepal 63.2910:27.713:57:12.7P
Anchorage, Alaska 82.0412:19.213:59:04.2P
Seattle, Washington 95.6013:24.214:00:09.2P
San Francisco, California 95.6813:24.514:00:09.5P
Los Angeles, California 99.1613:40.114:00:25.1Pdiff
Moscow, Russia 101.1513:48.914:00:33.9Pdiff
Phoenix, Arizona 104.3314:03.014:00:48.0Pdiff
Nairobi, Kenya 105.9214:10.114:00:55.1Pdiff
Palmer Station, Antarctica 106.7114:13.614:00:58.6Pdiff
Albuquerque, New Mexico 108.5814:21.914:01:06.9Pdiff
Golden, Colorado 108.8414:23.114:01:08.1Pdiff
Bergen, Norway 114.4614:48.014:01:33.0Pdiff
Wichita, Kansas 115.2914:51.714:01:36.7Pdiff
Duluth, Minnesota 115.7114:53.614:01:38.6Pdiff
Mexico City, Mexico 117.4115:01.114:01:46.1Pdiff
Brownsville, Texas 117.9615:03.614:01:48.6Pdiff
St. Louis, Missouri 120.2515:13.714:01:58.7Pdiff
Rome, Italy 121.3115:18.414:02:03.4Pdiff
London, England 122.8215:25.114:02:10.1Pdiff
Knoxville, Tennessee 125.0515:35.014:02:20.0Pdiff
Ottawa, Canada 126.1015:39.714:02:24.7Pdiff
Washington, D.C. 129.2315:53.614:02:38.6Pdiff
Philadelphia, Pennsylvania 129.8015:56.114:02:41.1Pdiff
New York, New York 130.0415:57.214:02:42.2Pdiff
Bangor, Maine 130.1115:57.514:02:42.5Pdiff
Boston, Massachusetts 130.6515:59.914:02:44.9Pdiff
Miami, Florida 133.0016:10.314:02:55.3Pdiff
Lima, Peru 137.5216:30.414:03:15.4Pdiff
San Juan, Puerto Rico 147.8119:41.414:06:26.4PKPdf

Travel Time Information and Calculator

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