This phenomenon has surged since 2009, with witnesses saying they hear, grinding metal, trumpets, howling and loud booms or explosions.
But what is causing this global phenomena, Aliens, HAARP, or could they be a warning from God, the beginning of the seven trumpets of the apocalypse, prophesied in the book of Revelation?
Apocalyptic Like Sounds Increase Around The World
Strange sounds in Conklin, Alberta
Strange sound in Kiev
UFO Emits Terrifying Sound
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