Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. An infrasound station array ...

Giant solar balloons were sent 70,000 feet up in the air to record sounds of Earth’s stratosphere — and the microphones picked up some unexpected sounds. The stratosphere is the second layer of ...

Add Yahoo as a preferred source to see more of our stories on Google. Solar-powered balloons are recording mysterious sounds below human hearing in the stratosphere. The unknown crackling could be the ...

The map shows infrasound stations and earthquakes considered in this study. Not all stations operated contemporaneously, but all were active for some period between 2018 and October 2022. Image from ...