Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 7, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2678 | N11 | E29 | 04 | 0040 | Beta | Sep 10, 2017 | Sep 17, 2017 | Oct 1, 2017 |
| № 2677 | N18 | E23 | 01 | 0010 | Alpha | Sep 10, 2017 | Sep 17, 2017 | Sep 30, 2017 |
| № 2674 | N14 | W30 | 10 | 0680 | Beta | Sep 6, 2017 | Sep 13, 2017 | Sep 26, 2017 |
| № 2673 | S09 | W47 | 24 | 0960 | Beta-Gamma-Delta | Sep 5, 2017 | Sep 11, 2017 | Sep 25, 2017 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1988 to September 2017. The gray background is the average SSN index.
