I'm in the general tri state area at the moment, and about every 30 minutes or so there's another MASSIVE boom. Not like a roadwork blasting or a coal mine blasting type of boom. It's also not like a sonic boom (like what keeps happening in Florida).
It's sounds kind of like a cross between thunder (but currently not storming) and a regular explosion. Also the ground/buildings around here are shaking a little bit when it happens, which is VERY unusual (basically never happens).
DUMB activity maybe? There are massive amounts of old mines in this general area, and Lord only knows what's inside of them at this point.
Just figured I'd throw this out there for anyone else in the general tristate area to comment on. Might be a habbening, who knows?
Experienced the same not far from there a week ago. Sounded like a yuge backfire from inside an enclosure, but the people around me all just looked around like, what was that? Nobody could ever pinpoint what happened and never saw any first responders.
Oh, and if you look up the earthquakes at Fincastle, TN they look suspicious to me too.