No sunspots were observed since June 15, when the daily sunspot number was 11. This does not mean there were 11 sunspots seen, but instead it means that one sunspot group was observed containing one sunspot. The sunspot number is derived by assigning 10 points for each sunspot group, and one point for each sunspot. So, 11 is the minimum non-zero sunspot number.
On June 8, the daily sunspot numbe...
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On June 8, the daily sunspot numbe...
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