Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 1, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2689 | N13 | W76 | 01 | 0040 | Alpha | Nov 26, 2017 | Dec 3, 2017 | Dec 17, 2017 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1988 to December 2017. The gray background is the average SSN index.
