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The K7RA Solar Update

Thread starter ARRL
Start date Apr 10, 2020

ARRL

Well-Known Member

Apr 10, 2020

After five days of new Cycle 25 sunspot activity, sunspots vanished. Average daily sunspot number rose from 3.6 last week to 5.1 this time. The average daily sunspot number over the days they were visible, March 31 through April 4, was 12.2, but these observations straddled two reporting weeks.

Average daily solar flux rose from 69.4 to 70.2. Geomagnetic indicators remain quiet, with average pla...

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The K7RA Solar Update

ARRL

Well-Known Member

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