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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 31, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1150 | S21 | E37 | 12 | 0050 | Beta | Feb 4, 2011 | Feb 11, 2011 | Feb 25, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to January 2011. The gray background is the average SSN index.
