Some one else suggested frost quakes, but I dunno. Sound like thunder in the distance, boom them rumble. What ever
it was it did it pretty steady for a hour, hour and a half or so. Who knows, I hasn't done it in a couple hours.
I talk to my sis in law, she every time it would do it her mobile home would rattle. She lives south of me of hwy 16. I
Weird.