You may have heard about the New Madrid Fault Line, which runs underneath this very region we occupy, my fellow Kentuckians.
Although not much of major seismic importance has occurred in our lifetime, we still must take note that in 1812, the New Madrid quake was an estimated 8.0 or greater. Described as "the most intense intraplate earthquake series to have occurred in the contiguous United States", it was powerful enough to make church bells ring in Boston.
A University of Kentucky website calls the Western Kentucky area "the most seismically active region in the United States east of the Rockies". And if that wasn't bad enough, to the East, we're bounded by the Southern Appalachian Seismic Zone, which is also extremely active and produces tremors that affects Kentucky greatly. We're surrounded.
Despite its strongest shocks having taken place a century ago, some say the New Madrid Fault is just getting warmed up because it's such a very young geological feature. Wikipedia says:
Because uplift rates associated with large New Madrid earthquakes could not have occurred continuously over geological timescales without dramatically altering the local topography, studies have concluded that the seismic activity there cannot have gone on for longer than 64,000 years...