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The K7RA Solar Update

A

ARRL

Well-Known Member
Nov 15, 2008
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On Wednesday, April 13, the daily sunspot number reached a new high for Solar Cycle 24 when it hit 153. I looked back over this calendar year and saw that the previous high was 137 on March 8, 2011, 16 points lower than Wednesday. That week’s Solar Update said that “the last time the daily sunspot number was higher than this was July 7, 2005, when it was 149.”

I knew I would have to inspect suns...





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