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) | |
|---|---|---|---|---|---|---|---|---|
| № 2679 | N14 | W27 | 04 | 0010 | Beta | Sep 7, 2017 | Sep 14, 2017 | Sep 27, 2017 |
| № 2678 | N11 | E18 | 03 | 0040 | Alpha | Sep 10, 2017 | Sep 17, 2017 | Oct 1, 2017 |
| № 2677 | N17 | E12 | 03 | 0010 | Beta | Sep 10, 2017 | Sep 17, 2017 | Sep 30, 2017 |
| № 2674 | N14 | W41 | 13 | 0600 | Beta | Sep 6, 2017 | Sep 13, 2017 | Sep 26, 2017 |
| № 2673 | S09 | W58 | 21 | 1000 | 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.
