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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: Sunspot Cycle 25 is under way. We saw one new spot on July 28 and two new ones on August 2 and 3. The daily sunspot numbers were 22 and 23 on the dates of their appearance, and the total sunspot area grew on Wednesday to 160 millionths of the visible solar disc. The total sunspot area was smaller the next day, August 6, but the daily sunspot number increased fr...

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    The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources.
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