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== PRELIMINARY EARTHQUAKE REPORT ==
California Integrated Seismic Net
USGS/ Caltech/ CGS/ UCB/ UCSD/ UNR

Version #3: This report supersedes any earlier reports of this event.
This event has been reviewed by a seismologist.

A light earthquake occurred at 5:56:38 PM (PST) on Saturday, March 25, 2006.
The magnitude 4.6 event occurred 10 km (6 miles) SW of Petrolia, CA.
The hypocentral depth is 22 km (14 miles).


Magnitude 4.6 - regional moment magnitude (Mw)
Time Saturday, March 25, 2006 at 5:56:38 PM (PST)
Sunday, March 26, 2006 at 1:56:38 (UTC)
Distance from Petrolia, CA - 10 km (6 miles) SW (236 degrees)
Rio Dell, CA - 35 km (22 miles) SW (224 degrees)
Ferndale, CA - 36 km (22 miles) SSW (197 degrees)
Eureka, CA - 61 km (38 miles) SSW (198 degrees)
Sacramento, CA - 315 km (196 miles) NW (308 degrees)
Coordinates 40 deg. 16.4 min. N (40.273N), 124 deg. 23.2 min. W (124.387W)
Depth 21.9 km (13.6 miles)
Location Quality Fair
Location Quality Parameters Nst=190, Nph=190, Dmin=20 km, Rmss=0.09 sec, Erho=0.8 km, Erzz=0.4 km, Gp=219.6 degrees
Event ID# nc51169417
Additional Information 2-degree map
Topo map centered at earthquake (This link takes you offsite).
ShakeMap shaking intensity maps
Did you feel it?
Berkeley moment tensor solution
NCSN First Motion Mechanism 1
NCSN First Motion Mechanism 2
Waveforms
Waveforms for ShakeMap

For more information, see http://quake.wr.usgs.gov/

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