Underground Rumbling News Today

Theories from earthquakes to water pressure problems. but so far no one has been able to explain all of that strange noise. matt smith from our green bay station wbay tells us whats shaking. >> what is this? >> reporter: we begin our story at the end of our interview with uwgb geologist. i ask if theres anything else hed like to ad? >> not really. ive run out of ways to say i dont know. >> reporter: thats in essence what the experts say they know. >> im as confused and intrigued as anybody is ab...