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The K7RA Solar Update

ARRL

Well-Known Member
Nov 15, 2008
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*If you haven’t heard, the big geomagnetic storm predicted for yesterday, Thursday, January 9, did not happen. Planetary A index was predicted to be 73 for the day, and instead it was a quiet and stable 10. The planetary A index predicted for today, January 10, is 41. The latest forecast from late Thursday has revised that to 40.

If the planetary A index had reached 73 yesterday, it would have b...





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