1973 Knoxville earthquake

On 30 November 1973, at 07:48 UTC (02:48 EST), a mb4.7 earthquake struck 1 km (0.62 mi) north-east of Alcoa, in the U.S. state of Tennessee. The earthquake was felt 2,100 km2 (810 sq mi) in the area.

Source: Wikipedia — 1973 Knoxville earthquake (CC BY-SA 4.0)