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Auroral Kilometric Radiation

Auroral Kilometric Radiation

Date: 26 June 2008
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 it.

Last Update: 1 September 2019
23-Apr-2024 23:41 UT

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