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The K7RA Solar Update

ARRL

Well-Known Member
Nov 15, 2008
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As reported in The ARRL Letter on Wednesday, six sunspot groups were visible, but that number shrunk to two on Thursday. Daily sunspot numbers declined from 84 to 29 over those two days as well, but the average sunspot number for the reporting week (Thursday, May 5 through Wednesday, May 11) grew by nearly 7 points from last week, to 74.6. Sunspot numbers for May 5-11 were 95, 71, 38, 61, 93, 8...





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