bill: we might have the new answers now on the mystery what might be going boom in the night. residents in a small wisconsin town west of green bay plagued by a week of loud unexplained sounds shaking their homes and triggering a rash of nervous 911 calls. now the officials in that town might have an answer. our community did in fact experience an earthquake that registered 1.5 on the earthquake magnitude scale. bill: mike tobin is live in clintonville, wisconsin, to try to get to the bottom of all of this. mystery solved, mike, or not? reporter: well, mystery seems to be solved. the mystery seems to be a swarm of very small earthquakes. the kind of thing in california no one would notice but this is wisconsin