Fireballs
"I think if it wasn't the military, it may well have been a meteor, which may have been natural or a piece of space junk returning to Earth," said Michael Covington, an artificial intelligence expert who's been involved in astronomy for 50 years.
Because the boom was deafening across a wide area, a ground-based explosion could be ruled out as the cause, according to Covington.
"It seemed to be loud at a bunch of different places from the Athens Country Club to the Epps Bride Parkway area" in a north-to-south direction, he said.
Covington heard rattling in his Athens home at 1:26 p.m. Saturday.
It was captured by UK Meteor Network's Wilcot station (see video below).
Storm Team 2 Chief Meteorologist Patrick Hammer says the meteor was probably the size of a baseball that burned up in the atmosphere. In order for it to be caught on camera, it is likely that it was also much brighter and more brilliant to the naked eye.
See video footage here

Could the mystery boom have been caused by a meteor, like this one recorded by a dashcam in Portland, in the United States? PHOTO / FILE
Whatever it was, it was strong enough to be picked up by a seismograph used to monitor earthquakes but almost certainly came from the sky.
Residents in Oromahoe, Ohaeawai, Puketona, Kawakawa and Opua reported hearing what sounded like a loud explosion about 6.15pm on Sunday. Others reported a "blinding flash" around the same time.
Serena Jenkins, who lives at Oromahoe, said it was loud enough to shake her home.
"It was amazing. It felt like something had crashed into our house. We went outside straight away but we couldn't see anything."

Photographer Ari Rex snapped this meteor hurtling past Earth while taking pictures in Namadgi National Park.
Mr Rex was teaching a photography workshop at the Orroral Homestead when he unexpectedly captured a meteor hurtling past Earth.
"Last Friday, during the new moon, I went to Namadgi National Park to teach an advanced Milky Way photography workshop," he said.
"It's very dark out there when there is no moon so it makes it perfect for photographing the Milky Way, especially now in winter."
Although he expected to snap some stellar shots of the twilight sky, he was completely surprised by the photos when he looked back at them.
"I was lucky enough to capture this meteor in my frame. This is a rare phenomenon," he said.
"Usually you see them at night. But you typically never see them during the day.
"According to some quick calculations I did - considering the shutter speed of the shot - I found that the meteor was travelling at least 60,000 kilometres per hour."

The phenomenon was captured by a camera from the Hong Kong Space Museum’s Sai Kung iObservatory (left). The fireball races across the night sky (right).
Some netizens said they mistook the bright flying object emitting green light for an airplane or a drone. Others said it could have been a UFO (unidentified flying object), Headline Daily reports.
A video clip from a dash cam shows the fireball streaking across the sky from left to right at a moderate speed for about five seconds.
The Hong Kong Observatory later confirmed on its Facebook page that the phenomenon was captured by a camera from the Hong Kong Space Museum's Sai Kung iObservatory at 10:42 p.m.
.
But early Friday morning was the first time his camera ever captured a fireball streak across the sky in Bastrop. Olmsted and his wife were driving back to their Bastrop home from the Austin airport around midnight when they noticed the bright light.
"We both spotted it," says Olmstead. "My wife was driving, and I was in the passenger seat and we both saw it and we were both amazed."
The couple said they're not sure if anyone else saw what they saw because it was late and there weren't that many people driving on State Highway 71 in Bastrop at the time.












Comment: For further information read Earth Changes and the Human Cosmic Connection by Pierre Lescaudron and Laura Knight-Jadczyk.