Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 23, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1661 | N13 | E60 | 01 | 0020 | Alpha | Jan 29, 2013 | Feb 4, 2013 | Feb 18, 2013 |
| № 1660 | N14 | W28 | 21 | 0190 | Beta-Gamma | Jan 22, 2013 | Jan 29, 2013 | Feb 11, 2013 |
| № 1658 | S12 | W60 | 01 | 0060 | Alpha | Jan 19, 2013 | Jan 26, 2013 | Feb 9, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to January 2013. The gray background is the average SSN index.
