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) | |
|---|---|---|---|---|---|---|---|---|
| № 2677 | N19 | E53 | 02 | 0010 | Alpha | Sep 10, 2017 | Sep 17, 2017 | Oct 1, 2017 |
| № 2676 | S09 | W63 | 04 | 0030 | Beta | Sep 1, 2017 | Sep 8, 2017 | Sep 21, 2017 |
| № 2675 | S02 | W74 | 04 | 0010 | Beta | Aug 31, 2017 | Sep 7, 2017 | Sep 21, 2017 |
| № 2674 | N14 | E01 | 34 | 0740 | Beta | Sep 6, 2017 | Sep 13, 2017 | Sep 26, 2017 |
| № 2673 | S08 | W14 | 28 | 0680 | Beta-Gamma-Delta | Sep 5, 2017 | Sep 12, 2017 | Sep 25, 2017 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1988, January to 2017, September. Gray background - average solar cycle.
