NASA satellites catch Earth's magnetic field making music

Earth's magnetic field occasionally bursts into song — but these compositions are written with electromagnetic radiation, not sound waves. When converted to audio signals, though, these strange bursts sound like a rising chorus of chirping vocals similar to morning birdsong, which is why physicists call these short, intense bursts of radiation "chorus waves." Each burst of radiation lasts just a few tenths of a second, but the signals can repeat for hours. And, as pretty as they sound, chorus waves can be extremely dangerous to satellites in orbit. More

(Source: Space.com - Feb 7)