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    Auroral Kilometric Radiation

    Date: 26 Jun 2008
    Credit: Courtesy of Prof. D. Gurnett, University of Iowa
    Copyright: ESA

    Visual representation of high time resolution Auroral Kilometric Radiation (AKR) converted to audio. AKR is composed of many rapid combinations of rising and falling tones, sounding a bit like the R2-D2 robot in Star Wars.

    The Wide Band (WBD) instrument on-board Cluster recorded this sound. Note that the original frequency range is outside the audible range but imposing an artificial frequency shift enables humans to hear them.


    Last Update: 24 Jul 2008

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