Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 21, 2012. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1422 | N16 | W09 | 12 | 0240 | Beta | Feb 21, 2012 | Feb 28, 2012 | Mar 13, 2012 |
| № 1421 | N18 | E34 | 02 | 0030 | Beta | Feb 24, 2012 | Mar 2, 2012 | Mar 16, 2012 |
| № 1420 | N11 | W28 | 02 | 0060 | Beta | Feb 20, 2012 | Feb 27, 2012 | Mar 11, 2012 |
| № 1419 | N29 | W29 | 03 | 0020 | Beta | Feb 20, 2012 | Feb 27, 2012 | Mar 12, 2012 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1983 to February 2012. The gray background is the average SSN index.
