Shake map showing the epicenter of the earthquake in Virginia

The 2011 Virginia Earthquake occurred on August 23, 2011, at 13:51:04 EDT (17:51:04 UTC) in the Piedmont region of the US state of Virginia. The epicenter, in Louisa County, was 61 km (38 mi) northwest of Richmond and 8 km (5 mi) south-southwest of the town of Mineral. It was an intraplate earthquake with a magnitude of 5.8 and a maximum perceived intensity of VII (very strong) on the Mercalli intensity scale. Several aftershocks, ranging up to 4.5 M_w in magnitude, occurred after the main tremor.

• http://en.wikipedia.org/wiki/2011 Virginia earthquake