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) | |
|---|---|---|---|---|---|---|---|---|
| № 2683 | N14 | E21 | 02 | 0270 | Alpha | Oct 3, 2017 | Oct 9, 2017 | Oct 23, 2017 |
| № 2682 | S09 | E08 | 06 | 0120 | Beta | Oct 2, 2017 | Oct 8, 2017 | Oct 22, 2017 |
| № 2681 | S14 | W48 | 01 | 0070 | Alpha | Sep 27, 2017 | Oct 4, 2017 | Oct 18, 2017 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1988, January to 2017, September. Gray background - average solar cycle.
