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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: The recent zero-sunspot period of June 23 through July 4 ended with the appearance of a single sunspot group (2560) on Tuesday, July 5. Sunspot numbers were 23, 11, and 25, respectively, on July 5-7.

Compared to the previous week, the average daily sunspot number rose from zero to 4.9. Average daily solar flux declined from 75.6 to 73.1, while the average planet...

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