Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 13, 2013. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1672 | S18 | E27 | 01 | 0010 | Alpha | Feb 16, 2013 | Feb 23, 2013 | Mar 8, 2013 |
| № 1671 | N14 | E46 | 01 | 0120 | Alpha | Feb 17, 2013 | Feb 24, 2013 | Mar 10, 2013 |
| № 1670 | N17 | W40 | 12 | 0170 | Beta-Gamma | Feb 11, 2013 | Feb 18, 2013 | Mar 3, 2013 |
| № 1667 | N22 | W75 | 01 | 0040 | Alpha | Feb 8, 2013 | Feb 15, 2013 | Mar 1, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to February 2013. The gray background is the average SSN index.
