Abstract
GEOMAGNETIC radio noise or ‘hiss’ usually occurs only in the audio region. During severe magnetic storms it has been reported up to 30 kc./s. on a sweep frequency analyser1 and at 70 and 180 kc./s. on fixed tuned channels2. The latter report2 was written after the records had been destroyed in a fire. New observations at up to 230 kc./s. are described here.
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References
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Helliwell, R. A., “Low Frequency Propogation Studies, Part 1”, ASTIA Document No. AD110184 (1958).
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DOWDEN, R. Geomagnetic Noise at 230 kc./s.. Nature 187, 677–678 (1960). https://doi.org/10.1038/187677a0
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DOI: https://doi.org/10.1038/187677a0
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