Maybe you are familiar with images of the northern lights or perhaps have been lucky enough to see them yourself, but did you know that apparently they also make a sound?  According to space.com, acoustic researchers at Alto University in Finland have identified a clapping sound associated with the aurora borealis that occurs 230 ft above the ground!  Just as is true with most mystery noises, they are brief and faint, require very careful listening as well as very low background noise in order to be heard.   There is an audio recording on here if you want to listen…

[via space.com, photo: shawn malone www.lakesuperiorphoto.com]

Tags: art, demonstrations, soundscapes