"Mysterious Booms and Trembles Plague Wisconsin Town, Baffle Scientists."

The craziness never ends in this state.

“I think that right now the greatest possibility is that it is some sort of natural phenomenon. I think that it’s a possibility that there is some earth shifting going on underneath the ground that creates those popping sort of exploding popping or vibrating noises that people feel,” City Administrator Lisa Kuss said.

My guess: It's nothing. The town is called Clintonville, for what it's worth.