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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 06-09-19, 17:12   #1
USA_bot
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The K7RA Solar Update

Old Cycle 24 sunspots returned this week, but for only two days (Sunday and Monday) with a sunspot number of 12. Average daily solar flux increased from 66 reported in last week’s bulletin to 67.4 this week.

Radiation from a coronal hole increased the average planetary A index from 5.7 last week to 19.9 this week, with the level on Saturday and Sunday at 38 and 45. In Fairbanks, Alaska’s College...



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