CLINTONVILLE (AP) — Authorities are investigating a series of booming noises and vibrations that seemed to come from underground and that made some Clintonville homes shake early Monday.
Residents of the city 40 miles west of Green Bay reported hearing booms that sounded like distant thunder and that made their homes vibrate first at around 1:45 a.m., then again at 5:30 a.m. and 7:15 a.m., City Administrator Lisa Kuss said.
“Nobody saw anything, it’s just what people hear and feel,” Kuss said.
There were no recorded earthquakes, and authorities found no gas in the sewers or problems with the city water pressure, she said. They also found nothing at an area landfill that might explain the rumbling, which seemed to come from underground, Kuss said.
Officials are checking with geologists in Madison to see whether something underground might be shifting, possibly because of the unusually warm weather, she said.
The reports seem to be clustered in the northeast part of the city.
Officials have been patrolling the streets and have found no damage and no one is hurt, she said. Some residents reported that they’ve heard similar sounds within the past two weeks, she said.
“I think that people are concerned but I don’t think there’s any sort of extreme panic,” Kuss said. “They know we are doing everything we can to determine what it is.”