A quiet neighborhood in British Columbia was subjected to the din. Image Credit: Kimberly Wookey
People from several different countries have been reporting strange 'trumpet blasts' coming from the sky.
The peculiar phenomenon, which was first reported back in 2008, is still no closer to being solved and continues to he heard in the United States as well as in Germany, Canada and elsewhere.
The sound, which seems to erupt from nowhere, resembles what you might hear if all the instruments in the brass section of an orchestra were to be played together at the same time.
In many cases the noise has been described as deafening.
"On the morning of August 29, 2013 at approximately 7:30am I was awoken by these sounds," said Kimberly Wookey, a witness from Canada who managed to record the strange din on multiple occasions from her house in British Columbia.
"I shot out of bed realizing it was the same sounds I had heard before and I ran looking for a camera to try to capture them with. I have no idea what these sounds are."
Another prominent incident took place in the Ukranian capital Kiev in August 2011
"The sound was extremely loud, with some people 30-40km from the recording also hearing it in other cities," said one witness. "It was in the news with the investigation with specialists and scientists, but there is still no exact explanation."
The sound was also heard in Montana in February 2012 by Aaron Traylor and his family.
"I’ve had vivid nightmares ever since I posted the very eerie strange sounds that has Missoula talking and looking towards the sky; awful, awful nightmares," he said. "My wife woke me from a dream last night where she says I was screaming like she’s never heard me scream before."
Some scientists believe that the phenomenon may have a geological origin.
One of Kimberly Wookey's recordings of the mysterious sounds can be heard below.