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The K7RA Solar Update 05/14/2021 Tad Cook, K7RA, Seattle, reports: Sunspot activity returned last Friday, May 7, and has held steady since. Average daily sunspot numbers rose from 11.9 to 21.1, and average daily solar flux was up 2.1 points to 74.3 for the reporting week ending May 12. Geomagnetic activity was quiet until Wednesday, May 12, when the planetary A index went to 41 as the result of a coronal mass ejection (CME) that blasted out of the sun on May 9. It was not expected to be very strong, but when it struck on May 12, it sparked a G3 class geomagnetic storm the strongest in the current solar cycle.

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