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 | E65 | 02 | 0010 | alpha | Sep 9, 2017 | Sep 16, 2017 | Sep 30, 2017 |
| № 2676 | S11 | W50 | 06 | 0020 | beta | Aug 31, 2017 | Sep 7, 2017 | Sep 21, 2017 |
| № 2675 | S07 | W62 | 05 | 0050 | beta | Aug 30, 2017 | Sep 6, 2017 | Sep 20, 2017 |
| № 2674 | N14 | E13 | 21 | 0930 | beta | Sep 5, 2017 | Sep 12, 2017 | Sep 25, 2017 |
| № 2673 | S10 | W01 | 12 | 0130 | beta-gamma | Sep 4, 2017 | Sep 11, 2017 | Sep 24, 2017 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1988, January to 2017, September. Gray background - average solar cycle.
