Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 24, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2681 | S13 | E34 | 02 | 0090 | Beta | Sep 27, 2017 | Oct 4, 2017 | Oct 18, 2017 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1988 to September 2017. The gray background is the average SSN index.
