Large 'boom' heard, felt throughout Cedar Valley - KWWL - Eastern Iowa Breaking News, Weather, Closings

Large 'boom' heard, felt throughout Cedar Valley

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KWWL's Lauren Moss hunted for the cause of the "boom" felt in the Cedar Valley on Jan. 12, 2015. KWWL's Lauren Moss hunted for the cause of the "boom" felt in the Cedar Valley on Jan. 12, 2015.
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CEDAR FALLS (KWWL) - Around 7:30 a.m. Monday, many people said a large boom could be heard and felt throughout the Waterloo/Cedar Falls area.

More than 60 people commented on KWWL's Facebook page, asking what it could have been. 

"There was a huge boom," said Todd Seelye of Cedar Falls. "It shook the house, shook the windows, shook the floors. I thought it was a tanker car exploding or something."

We contacted the Cedar Falls Police and Cedar Falls Fire Department. Neither had any information on what the loud noise was. They said they would have been on scene if something happened.

We also contacted Cedar Falls Utilities because some believe it could have been some type of transformer or telephone wire that had possibly gone out, but if that was the case crews would have also been out. An official said that they had no outages or explosions on their end that would have caused the noise and rumble Monday morning. 

Another theory we heard was an issue at the metal scrapyard. So, we stopped by the metal yard in Waterloo, who said that they produce noises all the time because of their auto shredder, but they said that nothing out of the ordinary came from the yard today. 

KWWL talked to dozens and dozens of people this morning, with the majority of them saying they heard a loud noise. Some even said their homes were physically shaken because of it. 

"The only comparison I can think of is someone doing a blast on a side of a mountain to knock the rocks off," said Trent Schnedler of Cedar Falls. "I mean, that's the only thing I can think of."

So what was this boom?

One theory that has not been proven wrong at this time is a "cryoseismic boom." This is a mini-explosion within the ground caused by the rapid expansion of frozen water.

While considered harmless, cryoseismic booms are capable of causing a lot of noise and rumble and can only happen when it is cold outside.

This was not confirmed to be the noise this morning, but was not proven wrong either. It would ultimately be hard to test this theory out at the same time.  

All and all, if it was an explosion or an outage, crews would have heard about it and been able to offer some insight on the issue. So at this point, we are all just left  wondering what the boom could have been. 
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