Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 31, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2674 | N14 | E66 | 05 | 0490 | Beta | Sep 6, 2017 | Sep 13, 2017 | Sep 26, 2017 |
| № 2673 | S08 | E50 | 01 | 0070 | Alpha | Sep 5, 2017 | Sep 11, 2017 | Sep 25, 2017 |
| № 2672 | N06 | W61 | 06 | 0070 | Beta | Aug 27, 2017 | Sep 3, 2017 | Sep 17, 2017 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1988 to August 2017. The gray background is the average SSN index.
