I’m not saying this is accurate, but Chili has had a few big earthquakes lately, and there is a mining operation over there, as we saw with the miners who were rescued last year. Of course, Kentucky has major coal mining activity, and they haven’t had any seismic activity of which I’m aware.
Thank heavens! General ignorance about earth sciences is what allows scams like AGW and nonsense about mining-caused earthquakes to flourish. Chile is located in a major tectonic subduction zone, where the Nazca oceanic plate is being pushed under the South American continental plate. That's what created the Andes Mountains. It's one of the most earthquake-prone places on the globe!
As a side note, without the volcanism associated with plate subduction, there would be no valuable minerals like copper to mine. The volcanic process brings minerals near to the surface and concentrates them.