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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 31, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1666 | S24 | E48 | 01 | 0010 | Alpha | Feb 5, 2013 | Feb 12, 2013 | Feb 26, 2013 |
| № 1665 | N11 | E49 | 02 | 0180 | Beta | Feb 5, 2013 | Feb 11, 2013 | Feb 25, 2013 |
| № 1663 | S09 | W11 | 01 | 0080 | Alpha | Jan 31, 2013 | Feb 7, 2013 | Feb 21, 2013 |
| № 1662 | N27 | W25 | 01 | 0050 | Alpha | Jan 30, 2013 | Feb 6, 2013 | Feb 20, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to January 2013. The gray background is the average SSN index.
