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The K7RA Solar Update

ARRL

Well-Known Member
Nov 15, 2008
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Trends over the past week were just the way we like them, with average daily sunspot numbers and solar flux increasing, and geomagnetic indices lower, compared to the previous seven days.

Why do we like these numbers? When solar flux and sunspot numbers are higher, this increases the likelihood that there will be openings on HF. Lower geomagnetic indices suggest lower absorption.

Average daily su...

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