The deep humming and booming sound – which has even been blamed on aliens by some conspiracy theorists – has now been heard in Britain.
Nottingham resident Calvin Kirklew recorded the chilling drone from the window of his home.
He said the inexplicable noise sounded like “grinding metal” or “trumpets” from above for at least 35 minutes.
The 24-year-old told the Nottingham Post: “It was coming from the direction of the Victoria Centre but from the sky.
“I was at home with my partner and we could both hear it — it was really weird.
“On the video I am quite shocked. It was strange.
“I have no idea what it might be.”
It had previously been heard in many place across the world.
Spooked witnesses have put the bizarre phenomenon down to a range of explanations — from aliens to an oncoming apocalypse.
Others argued it was the sound of an alien spaceship approaching earth.
The weird, loud noises have been heard across several continents, but scientists cannot agree on the reason for the widespread phenomenon.
For the past nine years increasing numbers of people have posted online videos of themselves witnessing strange unexplained ‘trumpet’ noises.
In some cases, the sounds have been accompanied by shaking windows and people being frozen with terror.
YouTube videos have been uploaded from as far afield as Germany, Ukraine, Belarus, Australian and North America.
Kimberly Wookey, from Terrace in British Columbia, Canada – who first recorded the odd noises in June 2013 and has since caught the weird sounds on camera a number of other times – dismissed fears the sounds signal the end of the world or the arrival of aliens.
She has also ruled out trains or building work, believing the cause of the noises may be “geophysical”, such as atmospheric pressure or tectonic plates grinding together.
NASA researchers say the planet does make background noises, but people would usually require radio antennas to pick it up.
A spokesman for the US space agency said: “If humans had radio antennas instead of ears, we would hear a remarkable symphony of strange noises coming from our own planet.
“Scientists call them ‘tweeks’, ‘whistlers’ and ‘sferics’.
“They sound like background music from a flamboyant science fiction film, but this is not science fiction.
“Earth’s natural radio emissions are real and, although we’re mostly unaware of them, they are around us all the time.”
Some astrophysicists say the noise is the result of a spacequake after the droning-like wail shook trees in Slovakia.
There’s been hundreds of reports of the extraterrestrial hum from the Netherlands to Morocco.