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  • Friday, December 16, 2011

    The K7RA Solar Update

    Solar activity dropped this week, with the average daily sunspot numbers declining more than 39 points to 94.7. It’s been 13 weeks since the average daily sunspot number for the week was that low or lower, when we reported an average of 91.7 in the September 16 edition of the Solar Update. The daily sunspot number has been lower than this week’s average, starting December 12 when it was 70, and...

    Via ARRL - Read the full Article