Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 21, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2638 | N18 | E58 | 04 | 0080 | Beta | Feb 26, 2017 | Mar 5, 2017 | Mar 19, 2017 |
| № 2637 | S04 | E47 | 01 | 0010 | Alpha | Feb 26, 2017 | Mar 4, 2017 | Mar 18, 2017 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1988 to February 2017. The gray background is the average SSN index.
