Observations of Enhanced Radiation in the kc/s-Band (5 and 8 kc/s) During Auroral and Geomagnetic Disturbances
A number of observers have reported the existence of a naturally occurring electromagnetic radiation in the audio-frequency range. It is now apparent that at least in regions near the auroral zones we may separate this electromagnetic radiation into two components: 1) a certain level of “hiss” which may vary from day to day but appears to be a phenomenon of fairly constant character varying with the time of the year and the place of observation, and 2) sudden bursts of “enhanced radiation” which may occur during short time intervals from several minutes up to hours.
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