USGSWhat was it that shook Dalton County, Georgia yesterday? ┬áResidents don’t exactly know, and some of them were pretty scared.

911 phone lines lit up yesterday afternoon after a mysterious “boom” was heard in the southern county, followed by a shaking of the ground that experts are calling as “earthquake”.

Officially, a 2.7-magnitude temblor rocked the Dalton area just before noon yesterday. While some residents were pretty sure it was an earthquake, others aren’t convinced.

“Chances are it might have been an earthquake, but maybe it was some big monster outside that’s coming to get us all,” said resident Jonathan Marks.

The U.S. Geological Survey didn’t officially call the phenomenon an earthquake until 2 hours after people said they felt the ground rattle and heard a loud boom in the air.

“I thought it was kind of like a huge explosion or a sonic boom because there was a little noise at first and then a loud explosion and I felt it right between my shoulders it was like it come from the air,” said Mary Ellen Gurley, an employee at Dalton State College.

The USGS says Northwest Georgia is not normally a region prone to earthquakes. The largest nearby earthquake was on April 29th, 2003. It was a 4.6-magnitude temblor located near Fort Payne, Alabama.

The Dalton Police Department was flooded with phone calls, but fortunately no one was injured.

You can listen to one of those 911 calls below.