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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1148 | S28 | W72 | 03 | 0020 | Alpha | Jan 16, 2011 | Jan 23, 2011 | Feb 6, 2011 |
| № 1147 | N24 | E09 | 09 | 0170 | Beta | Jan 23, 2011 | Jan 30, 2011 | Feb 13, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to January 2011. The gray background is the average SSN index.
