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) | |
|---|---|---|---|---|---|---|---|---|
| № 2678 | N11 | E31 | 04 | 0040 | Beta | Sep 10, 2017 | Sep 17, 2017 | Oct 1, 2017 |
| № 2677 | N18 | E25 | 01 | 0010 | Alpha | Sep 10, 2017 | Sep 17, 2017 | Sep 30, 2017 |
| № 2674 | N14 | W28 | 10 | 0680 | Beta | Sep 6, 2017 | Sep 13, 2017 | Sep 26, 2017 |
| № 2673 | S09 | W45 | 24 | 0960 | Beta-Gamma-Delta | Sep 5, 2017 | Sep 11, 2017 | Sep 25, 2017 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1988, January to 2017, September. Gray background - average solar cycle.
