Thank you for that link, I had not seen that one! Ummmmm.... Farms causing that sort of activity on the scale? What kind of farms do they have in Wisconsin? lol, I am kidding. Fracking perhaps, but it seems like folks would know if fracking was done in there area.
That has been going on for awhile there, I feel bad for the folks that have to put up with it. Well, I have not heard anything about it recently, so maybe it stopped. But yeah strange sounds are going on all over.