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The K7RA Solar Update

ARRL

Well-Known Member
Nov 15, 2008
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All daily sunspot numbers dipped into the double digits last week, with the average declining from 73.7 to 43.4. This compares the latest July 16-22 period against the previous seven days.

Over the same periods, average daily solar flux went from 114.8 to 95.1.

Geomagnetic indices were mostly quiet, with average daily planetary A index going from 13.7 to 6.1 and average mid-latitude A index decli...

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