Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 13, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1159 | N19 | E11 | 04 | 0010 | Beta | Feb 15, 2011 | Feb 22, 2011 | Mar 7, 2011 |
| № 1158 | S19 | E13 | 12 | 0040 | Beta | Feb 15, 2011 | Feb 22, 2011 | Mar 7, 2011 |
| № 1157 | N18 | W16 | 05 | 0030 | Beta | Feb 13, 2011 | Feb 19, 2011 | Mar 5, 2011 |
| № 1156 | S21 | W20 | 02 | 0010 | Beta | Feb 12, 2011 | Feb 19, 2011 | Mar 5, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to February 2011. The gray background is the average SSN index.
