Strange booming sounds are coming out of the sky in locations around the world – and experts are baffled as to what causes them.
Last week, residents in Alabama heard a strange ‘boom’ from the sky, with police notified about a ‘loud boom’ on Monday this week.
Police said the sound – described as the ‘Bama boom’ – shook houses near Lochbuie.
But similar sounds have been heard around the world, from Colorado to Yorkshire, with 64 reported this year, the Daily Mail reports – and other ‘booms’ were heard near Denver this month.
Experts have suggested a wide range of explantions from sonic booms to meteorites to controlled detonations of military weapons.
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But the ‘Bama boom’ seems to defy explanation.
Birmingham National Weather Service tweeted: ‘Loud boom heard: we do not see anything indicating large fire/smoke on radar or satellite; nothing on USGS indicating an earthquake.’
Bill Cooke, head of NASA’s Meteroid Environment Office at the Marshall Space Flight Center in Huntsville, said, ‘No one can figure out the cause.’
‘I’m kind of skeptical it could be a (meteor) because there were no reports of a fireball. There are reports of vapour trails.’