Shortly before 2 a.m., residents flooded the Clintonville Police Dispatch with calls reporting explosions, rattling, vibrations and homes shaking. About 150 calls were received between 1:45 a.m. and 11 a.m.
The city contacted geologists from the University of Wisconsin-Madison, but says the noises and vibrations felt in Clintonville were not typical of earthquake activity.
A seismic station in Shiocton had recorded unusual ground shaking in the past 18 hours. But that recorded activity probably won’t help the city determine what has been happening.
Authorities found no gas in the sewers or problems with the city water pressure. They also found nothing at an area landfill that might explain it.
The reports seem to be in the northeast part of the city.