As Green Bay's NBC26-TV shows, Clintonville's mysterious boom times are the "big story" in that part of Wisconsin. NBC26 hide caption itoggle caption NBC26 The Two-Way Wisconsin City Wonders: What Keeps Going Boom? March 21, 2012 For three days, people in Clintonville have been reporting loud sounds that shake the ground and homes. There haven't been any earthquakes. It's not the gas lines or pipes. One theory: warm temperatures have lead to ice cracking beneath the ground.