For an updated story on this go here: Wisconsin Boom Towns
Mysterious explosions. Unexplained shaking. Something’s going on in Clintonville, Wisconsin, but nobody seems to know what it is.
The sounds — variously described as rattling pipes, clanging metal, thunder or firecrackers — have continued on and off since early Sunday night in just one part of the small town of 4,600, located about 180 miles northeast of Madison.
Accompanying the sounds are vibrations that have shaken homes and household objects in the northeast corner of town, city manager Lisa Kuss said.
More at this link:
There are still really no answers in Clintonville about whom or what caused the loud booms people say they heard Sunday night and into the morning.
“It was kind of like constant boom, boom, boom!” said resident Joseph Clauson. “And you could feel like the ground shaking beneath you and whatnot.”
“It almost felt like a heavy duty thunderstorm, but it was shaking though,” said resident Al Miller.
Tip: Strange Sounds in the Sky blog
These booms are not unusual, as noted in this feature piece (Sounds from the sky: Reflections on historical observations and recent events), they have been reported historically in many locations. In this case, it is unlikely to be military exercises or mine explosives due to the time of night. But, that leaves many potential explanations included shallow seismic events and atmospheric phenomena. We will probably never know for sure. Yet, we record another Fortean event… as yet unexplained. I do not believe it is connected to the hoax noises that we had occur in the beginning of the year.
UPDATE (20-Mar-2012) Noise occurs a second night. How interesting.
Police say they received nearly 100 phone calls throughout the night about the loud booms. Dispatcher Karen Wegenke says most residents called about 12:15 a.m., 1:20 a.m., 2:20 a.m. and a few calls about 5:10 a.m. Tuesday.
Authorities in Clintonville are at a loss to explain the noise, which some have described as a jackhammer sound. Dozens of calls also came in to dispatchers early Monday.
One odd observation is the incredible temperature change that occurred over a week with very unseasonably warm temps observed (from 32F on March 9 to 80F reported on the 17th). That is 40 degrees above normal. Incredible.
Also, this: A seismic station near Clintonville has recorded unusual ground shaking since Sunday night.
UPDATE: (21-Mar-2012) Smaller, fewer booms Tuesday night:
Police dispatcher Tabitha Schoen says it was a quiet night in Clintonville until shortly after 5 a.m. when about 20 calls came in from residents who experienced the booms.
A police officer also radioed in unusually “booming noise” about 3 a.m. Wednesday, Schoen said.
Not only did they spend Tuesday checking off an extensive list of potential causes for a mystery late-night booming noise, but they did so on little sleep since the noise persisted a second night.
Lots of interesting explanations proposed. None have been confirmed.