Version #4: This report supersedes any earlier reports of this event.
This event has been reviewed by a seismologist.
A light earthquake occurred at 10:09:35 AM (PST) on
Thursday, January 7, 2010.
The magnitude 4.1 event occurred 10 km (6 miles) ENE of Milpitas, CA.
The hypocentral depth is 9 km ( 6 miles).
|Magnitude||4.1 - regional moment magnitude (Mw)|
|Time||Thursday, January 7, 2010 at 10:09:35 AM (PST)|
Thursday, January 7, 2010 at 18:09:35 (UTC)
|Distance from||Milpitas, CA - 10 km (6 miles) ENE (62
Alum Rock, CA - 12 km (8 miles) NNE (12 degrees)
Sunol, CA - 16 km (10 miles) SSE (150 degrees)
San Jose City Hall, CA - 17 km (11 miles) NNE (29 degrees)
|Coordinates||37 deg. 28.6 min. N (37.477N), 121 deg. 47.8 min. W (121.797W)|
|Depth||9 km (5.6 miles)|
|Location Quality Parameters||Nst= 89, Nph= 89, Dmin=3 km, Rmss=0.08 sec, Erho=0.1 km, Erzz=0.4 km, Gp=36 degrees|
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ShakeMap shaking intensity maps
NCSS First Motion Mechanism 1
Waveforms for ShakeMap
NCSS Moment Tensor Solution
Tsunami Information Statement from the WC/ATWC
For more information, see http://quake.wr.usgs.gov/