Solar activity increased last week. Compared to the previous seven days, average daily sunspot number increased from 1.6 to 12.6, while average daily solar flux rose from 68.9 to 71. After six days with sunspots making a re-appearance (October 12-17), there were no sunspots on Thursday, October 18.
Sunspot area was listed at zero on October 15-17, which means that the area was less than 10 milli...
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Sunspot area was listed at zero on October 15-17, which means that the area was less than 10 milli...
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