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Since 2000 researchers at Finland’s Aalto University have been collecting audio as part of what’s called the Auroral³ Acoustics⁴ project. Folk tales have long held that the lights also produce odd sounds, but the claims were hard to prove. And some researchers thought that any noises produced by the energetic particles that cause the light show would be far too high in the sky to be heard on the ground.

 

But the latest results indicate that at least some sounds are produced very close to the ground. A setup of three ground-based microphones allowed researchers to estimate that the sounds occur perhaps just 70 meters up. The results were just presented at the International Congress on Sound and Vibration⁵ in Vilnius, Lithuania.

 

More information about the sounds of the northern lights could lead to a more complete understanding of the phenomenon. So if you see an aurora, keep your ears open.

 

Thanks for the minute for Scientific Americans 60 second Science, I am Steve Mirsky

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