Gordon Fiander
Image taken:
Mar. 7, 2011
Sheffield, UK IO93FK
Recording of SID on 7th March. Using laptop soundcard to record VLF radio transmissions on 19.6kc (upper trace) and 20.7kc (lower trace) the effects of an M1.8 solar flare on the ionosphere can clearly be seen as positive and negative going deflections, creating a 'mirror image'. Antenna was a 1.2m frame loop.
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