Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 23, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2685 | S09 | E60 | 03 | 0070 | Alpha | Oct 28, 2017 | Nov 4, 2017 | Nov 18, 2017 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1988 to October 2017. The gray background is the average SSN index.
