Scientists are confused by the sudden detection of strange rumblings some 70,000 feet above the Earth’s surface, according to a press release from mid-May.
“[In the stratosphere,] there are mysterious infrasound signals that occur a few times per hour on some flights, but the source of these is completely unknown,” Daniel Bowman, senior scientist at Scandia National Laboratories in New Mexico, said of the bizarre phenomenon confusing the heck out of the scientific community.
The noises, known as infrasound, are only detected by specialized instruments and are far too low-pitched to be picked up by human ears, according to LiveScience. Researchers discovered the sounds after controlling for background noises from our planet, such as rocket launches, thunder, cities, turbines, planes, trains and even cars. Despite what appears to be a huge amount of analysis, the source of the sounds has totally eluded explanation.
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The sounds exist within our stratosphere, which runs from nine miles above the Earth’s surface and travels all the way up to about 31 miles, according to LiveScience. The area is known for being calm, with little turbulence, where a majority of sound is made up from things happening down here on Earth. (RELATED: ‘Spies’ And ‘Trash’: Half Of UFO Sightings Can’t Be Explained, US Intelligence Agencies Report)
Researchers hope new testing using solar powered balloons will help shed light on the source of the sounds. But until then, it remains a total and utter mystery (*cough* aliens *cough*).