The K7RA Solar Update

Discussion in 'ARRL News Feeds' started by American Radio Relay, Sep 13, 2019.

  1. No sunspots this week. Average daily sunspot numbers declined from 3.4 to zero. At the same time, average daily solar flux rose from 67.4 to 69.4.

    Geomagnetic activity quieted, with average daily planetary A index declining from 19.9 to 8.9, while average daily mid-latitude A index went from 16.7 to 7.7.

    Predicted solar flux is 68 on September 13-22, 69 on September 23 through October 5, 68 on Oc...

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