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The K7RA Solar Update

Discussion in 'ARRL Updates' started by ARRL, Oct 12, 2018.

  1. ARRL

    ARRL Well-Known Member

    Joined:
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    Last week this bulletin reported a return of sunspot activity on September 29 after a 16-day absence from September 13-28, but the new activity only lasted six days. As of Thursday night (October 11) we are now at seven days with no sunspots visible.



    Average daily sunspot number declined from 9.6 to 1.6, while average daily solar flux rose slightly from 68.4 to 68.9.

    Average planetary A index i...

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