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The K7RA Solar Update

ARRL

Well-Known Member
Nov 15, 2008
10,887
52
58
Two new sunspot groups appeared in the last week -- groups 1087 and 1088. Group 1088 lasted just one day -- on July 13, 2010 -- with a relative area of 10 (millionths of a solar hemisphere). Sunspot group 1087 had a relative area from July 9-15 of 30, 100, 120, 130, 70, 100 and 60. Sunspot numbers for July 8-14 were 11, 12, 18, 25, 22, 28 and 16, with a mean of 18.9. The 10.7 cm flux was 75.6, ...





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