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The K7RA Solar Update

A

ARRL

Well-Known Member
Nov 15, 2008
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Tad Cook, K7RA, Seattle, reports: Solar activity continues to increase. In last week’s bulletin ARLP027 average daily sunspot number was 34.7. This week it jumped to 55.6. Average daily solar flux increased from 86.9 to 88.9.


Despite solar flare activity pushing a sudden ionospheric disturbance and a dramatic HF radio blackout (on July 3), the average daily planetary A index for the week was onl...

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