Magnitude 4.7 TONGA
Wednesday, April 22, 2009 at 15:18:21 UTC
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).
| City | Distance (degrees) |
Travel Time (min:secs) |
Arrival Time UTC |
Phase |
|---|---|---|---|---|
| Wellington, New Zealand | 25.65 | 5:09.8 | 15:23:30.8 | P |
| Brisbane, Australia | 31.68 | 6:03.1 | 15:24:24.1 | P |
| Honolulu, Hawaii | 41.67 | 7:27.1 | 15:25:48.1 | P |
| Agana, Guam | 50.55 | 8:36.3 | 15:26:57.3 | P |
| Tokyo, Japan | 68.22 | 10:37.2 | 15:28:58.2 | P |
| San Francisco, California | 73.39 | 11:08.3 | 15:29:29.3 | P |
| Los Angeles, California | 73.93 | 11:11.5 | 15:29:32.5 | P |
| Phoenix, Arizona | 77.97 | 11:34.2 | 15:29:55.2 | P |
| Seattle, Washington | 79.78 | 11:44.1 | 15:30:05.1 | P |
| Anchorage, Alaska | 80.66 | 11:48.7 | 15:30:09.8 | P |
| Palmer Station, Antarctica | 81.59 | 11:53.7 | 15:30:14.7 | P |
| Mexico City, Mexico | 82.44 | 11:58.1 | 15:30:19.1 | P |
| Albuquerque, New Mexico | 82.70 | 11:59.4 | 15:30:20.4 | P |
| Beijing, China | 85.80 | 12:14.9 | 15:30:35.9 | P |
| Golden, Colorado | 85.81 | 12:15.0 | 15:30:36.0 | P |
| Brownsville, Texas | 86.21 | 12:17.0 | 15:30:38.0 | P |
| Wichita, Kansas | 90.64 | 12:37.8 | 15:30:58.8 | P |
| Lima, Peru | 93.38 | 12:50.4 | 15:31:11.4 | P |
| St. Louis, Missouri | 96.20 | 13:03.2 | 15:31:24.2 | P |
| Duluth, Minnesota | 97.24 | 13:07.9 | 15:31:28.9 | P |
| Knoxville, Tennessee | 99.37 | 13:17.3 | 15:31:38.3 | Pdiff |
| Miami, Florida | 101.05 | 13:24.8 | 15:31:45.8 | Pdiff |
| Washington, D.C. | 106.31 | 13:48.1 | 15:32:09.1 | Pdiff |
| Kathmandu, Nepal | 106.68 | 13:49.7 | 15:32:10.7 | Pdiff |
| Philadelphia, Pennsylvania | 107.90 | 13:55.2 | 15:32:16.2 | Pdiff |
| Ottawa, Canada | 108.16 | 13:56.3 | 15:32:17.3 | Pdiff |
| New York, New York | 108.87 | 13:59.5 | 15:32:20.5 | Pdiff |
| Boston, Massachusetts | 111.21 | 14:09.9 | 15:32:30.9 | Pdiff |
| San Juan, Puerto Rico | 112.21 | 14:14.3 | 15:32:35.3 | Pdiff |
| Bangor, Maine | 113.03 | 14:17.9 | 15:32:38.9 | Pdiff |
| Moscow, Russia | 134.50 | 15:53.2 | 15:34:14.2 | Pdiff |
| Bergen, Norway | 136.96 | 16:04.1 | 15:34:25.1 | Pdiff |
| Nairobi, Kenya | 144.07 | 16:35.7 | 15:34:56.7 | Pdiff |
| London, England | 145.56 | 19:12.0 | 15:37:33.0 | PKPbc |
| Rome, Italy | 154.77 | 19:27.5 | 15:37:48.5 | PKPdf |
Travel Time Information and Calculator
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
