Magnitude 4.1 SAN FRANCISCO BAY AREA, CALIF.
Saturday, September 06, 2008 at 04:00:15 UTC
Preliminary Earthquake Report
Magnitude | 4.1 |
---|---|
Date-Time |
Time of Earthquake in other Time Zones |
Location | 37.86N 121.99W |
Depth | 16 kilometers |
Region | SAN FRANCISCO BAY AREA, CALIF. |
Distances |
10 km (5 miles) SSW of Clayton, California 15 km (10 miles) SSE of Concord, California 25 km (15 miles) SW of Antioch, California 90 km (55 miles) SSW of SACRAMENTO, California |
Location Uncertainty | Error estimate not available, held by USGS NEIC to another agency's solution |
Parameters | not available |
Source | Northern California Seismic Network, UC Berkeley & USGS Menlo Park, USA |
Remarks | Felt (V) at Alamo; (IV) at Berkeley, Castro Valley, Concord, Daly City, Danville, Diablo, Dublin, Hayward, Lafayette, Moraga, Oakland, Orinda, Pleasant Hill, Sacramento, San Francisco, San Leandro. San Ramon and Walnut Creek; (III) at Alameda, Albany, Antioch, Belmont, Belvedere Tiburon, Benicia, Bolinas, Brentwood, Brisbane, Burlingame, Bryon, Campbell, Clayton, Corte Madera, Crockett, El Cerrito, El Sobrante, Emeryville, Fairfax, Fairfield, Felton, Fremont, Greenbrae, Half Moon Bay, Hercules, La Honda, Livermore, Lodi, Manteca, Martinez, Mill Valley, Millbrae, Modesto, Moss Beach, Novato, Oakley, Pacifica, Palo Alto, Pescadero, Pinole, Pittsburg, Placerville, Pleasanton, Port Costa, Redwood City, Richmond, San Anselmo, San Bruno, San Carlos, San Jose, San Lorenzo, San Mateo, San Pablo, Santa Clara, Sausalito, Sonoma, Soquel, Stockton, Sunol, Tracy and Union City. Felt as far north as Santa Rosa, as far east as Modesto and as far south as Watsonville. |
Event ID | uswqai |
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Theoretical P-Wave Travel Times
Earthquake Information for California
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Earthquakes: Frequently Asked Questions
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NB:
The official magnitude for this earthquake is indicated at the top of this page.
This was the best available estimate of the earthquake's size,
at the time that this page was created. Other magnitudes associated
with web pages linked from here are those determined at various times
following the earthquake with different types of seismic data.
Although, given the data used, they are legitimate estimates of magnitude
they are not considered the official magnitude.
The region name is an automatically generated name
from the Flinn-Engdahl (F-E) seismic and geographical regionalization scheme.
The boundaries of
these regions are defined at one-degree intervals and therefore differ from
irregular political boundaries.
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Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver