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== PRELIMINARY EARTHQUAKE REPORT ==
Southeast U.S. Seismic Networks

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

A micro earthquake occurred at 5:14:10 AM (CDT) on Friday, July 31, 2009 .
The magnitude 2.1 event occurred 5 km (3 miles) WNW of Ashland, VA .
The hypocentral depth is 6 km ( 4 miles).


Magnitude 2.1 - body magnitude (Mb)
Time Friday, July 31, 2009 at 5:14:10 AM (CDT)
Friday, July 31, 2009 at 10:14:10 (UTC)
Distance from Ashland, VA - 5 km (3 miles) WNW (296 degrees)
Glen Allen, VA - 13 km (8 miles) N (349 degrees)
Laurel, VA - 15 km (10 miles) N (351 degrees)
Richmond, VA - 26 km (16 miles) NNW (345 degrees)
Coordinates 37 deg. 46.8 min. N (37.780N), 77 deg. 32.2 min. W ( 77.536W)
Depth 5.9 km (3.7 miles)
Quality Fair
Location Quality Parameters Nst= 6, Nph= 9, Dmin=23 km, Rmss=0.19 sec, Erho=1.1 km, Erzz=1.7 km, Gp=162 degrees
Event ID# semcc0731
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