Earth Auroral Kilometric Radiation (AKR)

Spectrogram of Earth auroral kilometric radiation
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Earth Auroral Kilometric Radiation (AKR)
Earth Auroral Kilometric Radiation
Auroral radio emissions are associated with the northern lights or aurora. Studies, primarily using auroral imagers and low-frequency radio receivers constructed at The University of Iowa, have shown the aurora is caused by energetic electrons striking the atmosphere and that these same electrons generate intense radio emissions over a frequency range about 100 to 500 kHz. University of Iowa instrumentation also revealed that similar radio emissions occur in association with aurora at Jupiter, Saturn, Uranus, and Neptune.

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The Radio and Plasma Wave Group, Department of Physics & Astronomy, College of Liberal Arts & Sciences.
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