== PRELIMINARY EARTHQUAKE REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California

Version #2: This report supersedes any earlier reports of this event.
This earthquake was reviewed by Steve Walter - USGS. (v01)

A light earthquake occurred at 1:41:05 AM (PST) on Friday, December 14, 2001.
The magnitude 4.0 event occurred 14 km (9 miles) SSE of Ukiah, CA.
The hypocentral depth is 7 km ( 4 miles).


Magnitude 4.0 - local magnitude (Ml)
Time Friday, December 14, 2001 at 1:41:05 AM (PST)
Friday, December 14, 2001 at 9:41:05 (UTC)
Distance from Ukiah, CA - 14 km (9 miles) SSE (147 degrees)
Lakeport, CA - 18 km (11 miles) W (271 degrees)
Kelseyville, CA - 25 km (16 miles) WNW (287 degrees)
Nice, CA - 25 km (16 miles) WSW (250 degrees)
Coordinates 39 deg. 2.7 min. N (39.045N), 123 deg. 7.2 min. W (123.120W)
Depth 6.8 km (4.2 miles)
Location Quality Good
Location Quality Parameters Nst= 82, Nph= 82, Dmin=9 km, Rmss=0.1 sec, Erho=0.1 km, Erzz=0.6 km, Gp=36 degrees
Event ID# nc40129539
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NCSN First Motion Mechanism 1

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