It's "the big story" in east central Wisconsin, as Green Bay's NBC26-TV reports:
Something keeps going boom in the city of Clintonville, and no one there has figured out for sure why it's happening.
For three days now, folks in Clintonville (population 4,600) have been rattled and rolled by noises that residents say sound like explosions and feel like little earthquakes.
City officials have mobilized work crews to get out to see if the noises are coming from gas lines or other pipes. No evidence was found.