Mystery of Earth’s ‘hum’ heard by millions, said solved by researchersIt is the unexplained buzzing noise that has fed suspicions of an alien invasion or UFO activity in the skies. But the mystery of a bizarre drone that has plagued millions of people around the world could finally be solved, scientists believe. ‘The Hum’ – as it is known – can be heard by some more than others and has been blamed for pushing people to the brink of madness with sleepless nights and a constant ringing in the ears. Some thought it was the fault of gas pipes or power lines, but experts now believe the elusive buzzing is down to “ocean waves.” Researchers say currents in the sea cause the Earth to vibrate subtly as they shift across its surface, creating “microseismic” activity that elicits a “ring.” The findings mean conspiracy theorists who had blamed submarines or even mating fish were at least looking in the right direction in their search for an answer to the intriguing low-level noise. According to scientists Fabrice Ardhuin, Lucia Gualtieri and Eleonore Stutzmann, who co-authored the study, “the hum is the least understood part of Earth’s oscillations.” The trio of French academics published their findings in the journal Geophysical Research Letters. “I think our result is an important step in the transformation of mysterious noise into an understood signal,” Mr Ardhuin said. The strange noise, which only affects one in 50 people – or two per cent of the world’s population – was first reported in the 1970s. MORE