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Sonic boom recorded on seismic sensors across southwest Montana and Yellowstone

Sonic boom recorded in Southwest Montana
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BUTTE — If you happened to hear a loud boom on Monday around 2:00 p.m., you are not alone.

Hundreds of people from southwest Montana, Idaho, and even Utah reported hearing a mystery boom that Mike Stickney of the Montana Bureau of Mines and Geologoy says showed up on seismic sensors that are spread out around western Montana.

"Yesterday at about 2:45 p.m. there was a sharp little event that showed up on a number of those stations. It did not look like a typical earthquake because the energy took an unusually long amount of time to get between those various seismic sensors," says Stickney, the director of the earthquake studies office at the Montana Bureau of Mines and Geology.

Stickney says on the American Meteor Society website, 13 people from Wyoming, Idaho, and Montana also reported seeing a fireball in the sky that coincided with the seismic sensor recordings.

He says oddly there was no sound reported with the fireballs.

"Sonic events like this are relatively unusual. Much more common are the earthquakes that are recorded on a daily basis," says Stickney.

He says the reports of the fireball along with the sonic boom that was recorded on seismic sensors leads him to believe that it was either a meteor or a large piece of space junk that fell into the atmosphere.