When the earth shakes or the sonic boom from an aircraft causes a loud sound to resonate in that particular area. But the recent booms heard are not caused by either of them. So what exactly are these mysterious booms?
Mystery booming sounds have left people baffled all over the planet.
The terrifying noises have been recorded everywhere from the Middle East to the East Midlands this year and Australia — with the majority heard on America’s eastern coast.
The latest boom came to light this week scaring residents in the US state of Alabama.
Cops say they were notified of a “suspicious sound” that was described as a “loud boom” at around 9 pm on Monday.
The boom dubbed “Bama Boom” shook multiple houses and appeared to originate on the northwest side of Lochbuie, police said.
But cops and experts can’t seem to figure out what caused the mysterious noise.
Some experts say causes could range from supersonic aircraft to meteors exploding in the atmosphere.
On October 10, a similar sound left Cairns locals confused. Many suggested it was an FA-18 Hornet plane was heard flying.
Two weeks later, another boom was heard over the Eyre Peninsula in South Australia at the same time a blue meteor passed across the sky.
“It just got bigger and bigger and it was just this big flash across the sky and there were sparks coming off it,” Port Lincoln local Lisa Watson told News Corp.
“I pulled up home and I heard two massive bangs, maybe a second apart, and then the sky lit up again… I just felt the whole earth shake twice.”
— James Spann (@spann) November 14, 2017
But apparently this isn’t the first time the mysterious sound has been heard with 64 locations reporting similar sounds this year.
Among those in locations include Michigan, Lapland, St Ives, Swansea and Yorkshire.
Meanwhile, residents in Alabama took to Twitter to report the latest mysterious event.
One local described it as “an incredibly loud boom” that “shook the entire house”.
Re: loud boom heard: we do not see anything indicating large fire/smoke on radar or satellite; nothing on USGS indicating an earthquake. We don’t have an answer, and can only hypothesize with you. 1) sonic boom from aircraft; 2) meteorite w/ current Leonid shower?
— NWS Birmingham (@NWSBirmingham) November 14, 2017
The Birmingham Alabamba National Weather Service said the noise could be from an aircraft sonic boom or a meteorite from the Leonid shower.
They tweeted: ‘Loud boom heard: we do not see anything indicating large fire/smoke on radar or satellite; nothing on USGS indicating an earthquake.’
Meanwhile NASA’s Bill Cooke told ABC 3340 the origin of the mysterious boom still remains unclear.
He believes the sound could have been produced by a bolide, large supersonic aircraft or a ground explosion.
According to Cooke, NASA’s meteor scientists will continue to analyze new data in hopes of determining the cause of the boom.