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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 21, 2011. Coordinates are given as of the end of the day.
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 1162 | N18 | W32 | 24 | 0160 | Beta | Feb 20, 2011 | Feb 26, 2011 | Mar 12, 2011 |
| № 1161 | N11 | W28 | 39 | 0260 | Beta-Gamma | Feb 20, 2011 | Feb 27, 2011 | Mar 12, 2011 |
| № 1158 | S21 | W88 | 10 | 0200 | Beta-Gamma | Feb 15, 2011 | Feb 22, 2011 | Mar 8, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to February 2011. The gray background is the average SSN index.
