Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 17, 2012. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1420 | N10 | E23 | 01 | 0080 | Alpha | Feb 20, 2012 | Feb 27, 2012 | Mar 11, 2012 |
| № 1419 | N28 | E19 | 03 | 0060 | Beta | Feb 19, 2012 | Feb 27, 2012 | Mar 12, 2012 |
| № 1416 | S18 | W68 | 07 | 0160 | Beta | Feb 13, 2012 | Feb 20, 2012 | Mar 4, 2012 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1983 to February 2012. The gray background is the average SSN index.
