Thursday, September 17, 2009

Earthquake: 3.1 M Calistoga, CA


Version #1: This report supersedes any earlier reports of this event.
This is a computer-generated message. This event has not yet been reviewed by a seismologist.

A minor earthquake occurred at 6:02:17 PM (PDT) on Thursday, September 17, 2009.
The magnitude 3.1 event occurred 11 km (7 miles) WNW of Calistoga, CA.
The hypocentral depth is 8 km ( 5 miles).


Magnitude 3.1 - local magnitude (ML)
Time Thursday, September 17, 2009 at 6:02:17 PM (PDT)
Friday, September 18, 2009 at 1:02:17 (UTC)
Distance from Calistoga, CA - 11 km (7 miles) WNW (298 degrees)
Windsor, CA - 13 km (8 miles) NE (45 degrees)
Larkfield-Wikiup, CA - 14 km (9 miles) NNE (20 degrees)
Santa Rosa, CA - 20 km (12 miles) N (2 degrees)
San Francisco City Hall, CA - 98 km (61 miles) NNW (346 degrees)
Coordinates 38 deg. 37.7 min. N (38.629N), 122 deg. 41.9 min. W (122.698W)
Depth 8.1 km (5.0 miles)
Location Quality Good
Location Quality Parameters Nst= 70, Nph= 70, Dmin=8 km, Rmss=0.15 sec, Erho=0.2 km, Erzz=0.6 km, Gp=46.8 degrees
Event ID# nc71282711

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