Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 1, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2675 | S07 | W27 | 04 | 0030 | Beta | Aug 31, 2017 | Sep 7, 2017 | Sep 21, 2017 |
| № 2674 | N13 | E50 | 10 | 0770 | Beta | Sep 6, 2017 | Sep 13, 2017 | Sep 26, 2017 |
| № 2673 | S08 | E33 | 01 | 0080 | Alpha | Sep 5, 2017 | Sep 11, 2017 | Sep 25, 2017 |
| № 2672 | N07 | W73 | 04 | 0070 | Beta | Aug 28, 2017 | Sep 4, 2017 | Sep 17, 2017 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1988 to September 2017. The gray background is the average SSN index.
