Tuckaleechee Caverns in Townsend, Tennessee, houses the world's most sensitive seismic station, originally used by the US military during the Cold War to detect nuclear testing. The station, monitored 24/7, transmits data to organizations like the Department of Defense and the CTBTO. It can pinpoint nuclear blasts and major earthquakes globally. A recent, deeper-than-usual earthquake was felt, prompting concerns about potential aftershocks, though their prediction remains impossible.

Prepared by Olivia Bennett and reviewed by editorial team.