The K7RA Solar Update

Discussion in 'ARRL News Feeds' started by American Radio Relay, Apr 12, 2019.

  1. Similar to the last reporting week in ARLP014, the first three days (Thursday through Saturday) had no visible sunspots, but sunspots returned on Sunday through Thursday. Average daily sunspot number declined from 9.4 to 6.9, but average daily solar flux rose from 69.5 to 75.4.

    Geomagnetic indicators were slightly more active, with average daily planetary A index increasing from 8.4 to 10.6, and...

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