Active areas
Sunspots and active regions
By the end of the day, the following active regions with sunspots could be observed on the Sun's surface
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 2690 | N07 | W04 | 03 | 0010 | Beta | Dec 7, 2017 | Dec 13, 2017 | Dec 27, 2017 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1988, January to 2017, December. Gray background - average solar cycle.
