Noisy Earth

From NASA - National Aeronautics and Space Administration:

Listen to the Earth sing...or at least whistle! Space is neither empty, nor is it silent. In space, energetic charged particles, governed by magnetic and electric fields, behave unlike anything we experience on Earth. In regions laced with magnetic fields, such as the space environment surrounding our planet, particles are continually tossed to and fro by the motion of various electromagnetic waves, which like the roaring ocean surf, create a rhythmic cacophony that — with the right tools — we can hear across space! Listen now: http://go.nasa.gov/2uBOMcR

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