Below is a note forwarded to me by John Sumption from Jan Janssens. For those who do not know him, Jan runs a very comphrehensive solar tracking website here.
Jan included the caveat:
This topic’s sure to start another heated discussion on the solar blogs
So I’m happy to oblige by posting it here. Jansen makes some good points about the possible first month that cylce 24 spots exceed cycle 23 spots. But when you are in a deep minimum like this one, it is hard to pinpoint the transition, because next month may bring the reverse condition. He writes:
Prior to August 2008, only 3 SC24-sunspot groups appeared. This was in January, April and May. During these 3 months, SC23-activity was higher than SC24-activity. Based on the NOAA-numbering, there were respectively (SC23 to SC24) 2 to 1, 2 to 1, and 4 to 1 sunspotgroups visible.
In August, there were no sunspotgroups numbered by NOAA. However, on 21-22 August “something” was visible well enough to be seen by several observers and to prompt the SIDC to give a (preliminary) non-zero sunspotnumber for those days. Read the rest of this entry »












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