Since Sunday, Clintonville, Wi. heard and felt loud booming noises in the middle of the night, forcing residents to endure sleepless nights. This unexplained occurrence has captured the nation's attention and left residents concerned.

Residents of Clintonville, which is located approximately 40 miles west of Green Bay, have been complaining about unexplained booming noises. There are indications from witnesses that the booming is spreading to areas south and west of the original locations, reported WTAQ.

Sunday night, Clintonville police started receiving reports regarding explosions or explosion like sounds. They reportedly were receiving 50 to 60 calls at one time. Now, it has been about four days of constant booms and sleepless nights. 

Residents don't know what to make of it.

My husband thought it was cool, but I don't think so, said Jolene Van Beek, who awoke Sunday to a loud boom that shook her house, reported the Christian Science Monitor. This is not a joke I don't know what it is, but I just want it to stop.

The continuing noise prompted Van Beek to take her three children to her father's home, about 10 minutes away, so they can get an undisturbed sleep.

[It] almost felt like a heavy-duty thunderstorm, said Al Miller, according to Fox, as another resident had said that it sounded like a bomb had gone off.  

Clintonville City Administrator Lisa Kuss reportedly met with civil engineers and geologists on Tuesday morning. Officials are checking the water system to see if there are any problems. Officials are also checking gas lines, sewers and water pressure systems, but they have yet to find a source of the loud noises.

Wednesday night, Clintonville hosted a public meeting at a local high school to update residents on the situation. Kuss assured residents that the town and competent authorities are doing everything they can to find the cause of the problem.

People in the area are certainly frustrated, Kuss said, according to the Christian Science Monitor.

Authorities even set up audio and video equipment overnight. However, they did not find any evidence of shaking or booming on Wednesday night.

This is an issue, said resident Sharaon Binger at the public meeting, demanding answers from officials. There is something else going on.

She said that the booms and shakes have left cracks in her basement walls and floors. The insurance company will not pay for them until the mystery is solved.

Kuss believes the noises are coming from underground, reported the AP, and the next plan is to check well pumps to make sure they are operating properly.  

Some scientists agree with her.

Cliff Thurber is a geophysics professor. According to Fox, he reportedly believes that the odd booms not look like what normally happens when you have earthquakes occurring.

The ground is shaking in an unusual way, said Thurber.

City leaders said there were no mining explosions or explosive companies in the area. The military said they were not conducting any type of weapons testing or any operation that would cause a booming sound, reported WGBA-TV.

While authorities work to solve the mystery, check out other unexplained events in small towns across America.