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The K7RA Solar Update

ARRL

Well-Known Member
Nov 15, 2008
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We saw a nice run of eight days with a large sunspot, but none have emerged in the six days since. Unlike other recent spots, this one did not appear just for one or two days and then vanish. Sunspot numbers for July 9-15 were 15, 13, 0, 0, 0, 0 and 0 with a mean of 4. The 10.7 cm flux was 69.1, 67.8, 68.2, 68, 67.2, 66.6 and 66.5 with a mean of 67.6. The estimated planetary A indices were 6, 7, 4, 5, 10, 8 and 5 with a mean of 6.4. The estimated mid-latitude A indices were 6, 7, 2, 4, 5, 6 and 3 with a mean of 4.7. Geophysical Institute Prague predicts quiet conditions for July 17-20, unsettled July 21, quiet to unsettled July 22 and back to quiet on July 23.



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