Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 13, 2009. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1012 | S05 | E48 | 01 | 0010 | Alpha | Feb 18, 2009 | Feb 24, 2009 | Mar 10, 2009 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1980 to February 2009. The gray background is the average SSN index.
