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  1. I would like to talk about interesting sunspots of the past. We can start off with region 12673 since it formed and grew rapidly, possibly during a solar minimum. More than half of the top 50 solar flares in 2017 occurred in region 12673, and is the reason for the strongest geomagnetic storm of SC24 [KP8]. For me, this is quite an unusual sunspot, because of its occurrence in late 2017, which might be a year in solar minimum. This sunspot could be comparable to region 10930 in December 2006, but that could be in an another topic of its own.
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