Magnitude 3.9 NORTHERN CALIFORNIA
Friday, July 20, 2007 at 17:50:20 UTC
Theoretical P-Wave Travel Times
These maps show 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 |
|---|---|---|---|---|
| San Francisco, California | 1.08 | 0:20.7 | 17:50:40.7 | Pg |
| Los Angeles, California | 6.01 | 1:30.0 | 17:51:50.0 | Pn |
| Seattle, Washington | 8.99 | 2:11.0 | 17:52:31.0 | Pn |
| Phoenix, Arizona | 10.20 | 2:27.5 | 17:52:47.5 | Pn |
| Albuquerque, New Mexico | 13.46 | 3:12.2 | 17:53:32.2 | Pn |
| Golden, Colorado | 13.68 | 3:15.1 | 17:53:35.1 | Pn |
| Wichita, Kansas | 20.01 | 4:34.1 | 17:54:54.1 | P |
| Duluth, Minnesota | 23.74 | 5:13.8 | 17:55:33.8 | P |
| Brownsville, Texas | 24.86 | 5:24.1 | 17:55:44.1 | P |
| St. Louis, Missouri | 25.33 | 5:28.3 | 17:55:48.3 | P |
| Anchorage, Alaska | 28.01 | 5:52.5 | 17:56:12.5 | P |
| Mexico City, Mexico | 28.14 | 5:53.7 | 17:56:13.7 | P |
| Knoxville, Tennessee | 29.91 | 6:09.4 | 17:56:29.4 | P |
| Honolulu, Hawaii | 34.70 | 6:51.3 | 17:57:11.3 | P |
| Ottawa, Canada | 35.15 | 6:55.1 | 17:57:15.1 | P |
| Washington, D.C. | 35.36 | 6:56.9 | 17:57:16.9 | P |
| Philadephia, Pennsylvania | 36.50 | 7:06.8 | 17:57:26.8 | P |
| New York, New York | 37.18 | 7:12.5 | 17:57:32.5 | P |
| Miami, Florida | 37.98 | 7:19.3 | 17:57:39.3 | P |
| Boston, Massachusetts | 38.96 | 7:27.5 | 17:57:47.5 | P |
| Bangor, Maine | 40.10 | 7:37.0 | 17:57:57.0 | P |
| San Juan, Puerto Rico | 52.84 | 9:17.1 | 17:59:37.1 | P |
| Lima, Peru | 66.22 | 10:49.5 | 18:01:09.5 | P |
| Bergen, Norway | 72.43 | 11:28.0 | 18:01:48.0 | P |
| Tokyo, Japan | 73.75 | 11:35.8 | 18:01:55.8 | P |
| London, England | 77.08 | 11:55.0 | 18:02:15.0 | P |
| Agana, Guam | 83.57 | 12:29.9 | 18:02:49.9 | P |
| Moscow, Russia | 84.36 | 12:33.9 | 18:02:53.9 | P |
| Beijing, China | 84.75 | 12:35.9 | 18:02:55.9 | P |
| Rome, Italy | 89.99 | 13:01.1 | 18:03:21.1 | P |
| Wellington, New Zealand | 97.90 | 13:37.3 | 18:03:57.3 | P |
| Brisbane, Australia | 102.50 | 13:57.7 | 18:04:17.7 | Pdiff |
| Kathmandu, Nepal | 108.81 | 14:25.7 | 18:04:45.7 | Pdiff |
| Palmer Station, Antarctica | 115.02 | 14:53.3 | 18:05:13.3 | Pdiff |
| Nairobi, Kenya | 138.27 | 16:36.5 | 18:06:56.5 | Pdiff |
Travel Time Information and Calculator
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
