This disappearance depressed the average weekly sunspot number, which went from 17.4 last week to 10.3 this week, ending on Wednesday, December 23. Our reporting week runs from Thursday through Wednesday.
Sunspots went missing last Fr
iday and Saturday, but large new sunspot group 2794 appeared on Sunday, December 21, and on Wednesday, Spaceweather.com reported new sunspot group 2795 emerging over our sun’s southeastern limb.
Read more http://www.arrl.org/news/the-k7ra-solar-update-660
Mike Terry to WOR groups.io (2020-12-26)