High Quality Content by WIKIPEDIA articles! The 2011 Virginia Earthquake occurred on August 23, 2011, at 1:51 pm EDT (17:51 UTC) in the Piedmont region of the US state of Virginia. The epicenter, in Louisa County, was 38 mi (61 km) northwest of Richmond and 5 mi (8 km) 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 Mw in magnitude, occurred after the main tremor.