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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 moderate earthquake occurred at 12:50:05 AM (PDT) on Wednesday, May 9, 2007.
The magnitude 5.2 event occurred 62 km (39 miles) W of Petrolia, CA.
The hypocentral depth is 9 km ( 6 miles).


Magnitude 5.2 - regional moment magnitude (Mw)
Time Wednesday, May 9, 2007 at 12:50:05 AM (PDT)
Wednesday, May 9, 2007 at 7:50:05 (UTC)
Distance from Petrolia, CA - 62 km (39 miles) W (275 degrees)
Ferndale, CA - 67 km (42 miles) WSW (251 degrees)
Fortuna, CA - 77 km (48 miles) WSW (253 degrees)
Eureka, CA - 85 km (53 miles) WSW (238 degrees)
Sacramento, CA - 365 km (227 miles) NW (305 degrees)
Coordinates 40 deg. 22.5 min. N (40.376N), 125 deg. 0.8 min. W (125.014W)
Depth 9 km (5.6 miles)
Location Quality Fair
Location Quality Parameters Nst=250, Nph=250, Dmin=58 km, Rmss=0.19 sec, Erho=0.7 km, Erzz=1.7 km, Gp=244.8 degrees
Event ID# nc51181705
Additional Information 2-degree map
Google Earth KML (Requires Google Earth.)
Topo map centered at earthquake (This link takes you offsite.)
ShakeMap shaking intensity maps
Aftershock Warning
NCSN First Motion Mechanism 1
NCSN First Motion Mechanism 2
Waveforms
Waveforms for ShakeMap
Berkeley moment tensor solution

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

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