Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1658 | S12 | E23 | 01 | 0090 | Alpha | Jan 20, 2013 | Jan 26, 2013 | Feb 9, 2013 |
| № 1656 | N21 | W12 | 01 | 0010 | Alpha | Jan 17, 2013 | Jan 24, 2013 | Feb 7, 2013 |
| № 1654 | N06 | W31 | 18 | 0590 | Beta-Gamma-Delta | Jan 16, 2013 | Jan 22, 2013 | Feb 5, 2013 |
| № 1652 | N19 | W70 | 02 | 0090 | Alpha | Jan 13, 2013 | Jan 19, 2013 | Feb 2, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to January 2013. The gray background is the average SSN index.
