By car, the North Anna Power Station is 13 miles southwest of the quake site...

[link to maps.google.com]

Here's the USGS page...

Magnitude 5.8
Date-Time Tuesday, August 23, 2011 at 17:51:04 UTC
Tuesday, August 23, 2011 at 01:51:04 PM at epicenter
Time of Earthquake in other Time Zones

Location 37.936°N, 77.933°W
Depth 6 km (3.7 miles)
Region VIRGINIA
Distances 8 km (5 miles) SSW (195°) from Mineral, VA
11 km (7 miles) SSE (148°) from Louisa, VA
29 km (18 miles) NE (45°) from Columbia, VA
35 km (22 miles) E (87°) from Lake Monticello, VA
61 km (38 miles) NW (317°) from Richmond, VA
135 km (84 miles) SW (217°) from Washington, DC

Location Uncertainty horizontal +/- 2.3 km (1.4 miles); depth +/- 3.1 km (1.9 miles)
Parameters NST= 22, Nph= 23, Dmin=50 km, Rmss=0.44 sec, Gp= 79°,
M-type=centroid moment magnitude (Mw), Version=B
Source Southeast U.S. Seismic Network

Event ID se082311a



[link to earthquake.usgs.gov]