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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 11, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1670 | N17 | W14 | 13 | 0160 | Beta-Gamma | Feb 11, 2013 | Feb 18, 2013 | Mar 3, 2013 |
| № 1667 | N22 | W50 | 01 | 0060 | Alpha | Feb 8, 2013 | Feb 15, 2013 | Mar 1, 2013 |
| № 1665 | N10 | W93 | 01 | 0060 | Alpha | Feb 5, 2013 | Feb 12, 2013 | Feb 25, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to February 2013. The gray background is the average SSN index.
