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ARI e ARRL In quest'area trovate notizie provenienti dal sito ufficiale dell'ARRL e dall'ARI

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Old 13-09-19, 15:03   #1
USA_bot
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The K7RA Solar Update

No sunspots this week. Average daily sunspot numbers declined from 3.4 to zero. At the same time, average daily solar flux rose from 67.4 to 69.4.

Geomagnetic activity quieted, with average daily planetary A index declining from 19.9 to 8.9, while average daily mid-latitude A index went from 16.7 to 7.7.

Predicted solar flux is 68 on September 13-22, 69 on September 23 through October 5, 68 on Oc...



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