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
San Juan, Puerto Rico 2.48 0:40.7 9:48:47.7Pn
Miami, Florida 12.55 2:53.5 9:51:00.5Pn
Washington, D.C. 21.05 4:32.3 9:52:39.3P
Philadelphia, Pennsylvania 21.56 4:37.6 9:52:44.6P
New York, New York 22.06 4:42.9 9:52:49.9P
Knoxville, Tennessee 22.23 4:44.8 9:52:51.8P
Boston, Massachusetts 23.29 4:54.5 9:53:01.5P
Bangor, Maine 25.66 5:16.1 9:53:23.1P
Ottawa, Canada 26.92 5:27.4 9:53:34.4P
St. Louis, Missouri 27.05 5:28.6 9:53:35.6P
Brownsville, Texas 27.45 5:32.1 9:53:39.1P
Mexico City, Mexico 28.77 5:43.8 9:53:50.8P
Wichita, Kansas 31.16 6:04.8 9:54:11.8P
Lima, Peru 32.04 6:12.5 9:54:19.5P
Duluth, Minnesota 33.67 6:26.7 9:54:33.7P
Albuquerque, New Mexico 37.12 6:56.1 9:55:03.1P
Golden, Colorado 37.56 6:59.8 9:55:06.8P
Phoenix, Arizona 41.17 7:29.8 9:55:36.8P
Los Angeles, California 46.35 8:11.1 9:56:18.1P
San Francisco, California 50.11 8:39.9 9:56:46.9P
Seattle, Washington 51.84 8:52.9 9:56:59.9P
London, England 61.9710:04.3 9:58:11.3P
Bergen, Norway 65.7310:28.8 9:58:35.8P
Anchorage, Alaska 69.2810:51.2 9:58:58.2P
Rome, Italy 71.0911:02.2 9:59:09.2P
Honolulu, Hawaii 82.5112:06.210:00:13.2P
Moscow, Russia 83.2912:10.210:00:17.2P
Palmer Station, Antarctica 86.6412:26.910:00:33.9P
Nairobi, Kenya 105.0813:50.610:01:57.6Pdiff
Tokyo, Japan 119.2714:53.610:03:00.6Pdiff
Beijing, China 121.1515:01.910:03:08.9Pdiff
Wellington, New Zealand 122.1315:06.310:03:13.3Pdiff
Kathmandu, Nepal 127.1415:28.510:03:35.5Pdiff
Agana, Guam 133.8615:58.310:04:05.3Pdiff
Brisbane, Australia 140.9516:29.810:04:36.8Pdiff

Travel Time Information and Calculator

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