Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 17, 2017. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2636 | N11 | E40 | 02 | 0010 | Alpha | Feb 21, 2017 | Feb 28, 2017 | Mar 13, 2017 |
| № 2635 | N13 | W80 | 01 | 0000 | Alpha | Feb 12, 2017 | Feb 19, 2017 | Mar 4, 2017 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1988 to February 2017. The gray background is the average SSN index.
