Police, residents and experts are baffled by the source of mysterious booms and shaking that have been plaguing the town of Clintonville, Wis., for the past three days, and have caused some residents to flee.
The Clintonville Police Department said they have received over 250 calls about noises from underground shaking homes in the northeast corner of the town near Green Bay, Wis. with approximately 5000 residents.
The mystery is even stumping some of the brightest minds at the University of Wisconsin, who were consulted about whether or not these booms could be related to seismic activity.
"I think we can rule out that standard earthquake activity, [that] some swarm of earthquakes is happening in that region. It also really looks like it's not connected to, say, unusual drilling activity or some other kind of real obvious human induced signal, " Harold Tobin, one of those professors in the Geoscience department at the University of Wisconsin told WKOW.