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) | |
|---|---|---|---|---|---|---|---|---|
| № 1281 | S19 | E55 | 05 | 0030 | Beta | Sep 4, 2011 | Sep 11, 2011 | Sep 25, 2011 |
| № 1280 | N16 | W15 | 02 | 0010 | Beta | Aug 30, 2011 | Sep 6, 2011 | Sep 19, 2011 |
| № 1279 | N13 | E23 | 06 | 0100 | Beta | Sep 2, 2011 | Sep 8, 2011 | Sep 22, 2011 |
| № 1277 | N17 | E13 | 01 | 0050 | Alpha | Sep 1, 2011 | Sep 8, 2011 | Sep 21, 2011 |
| № 1275 | N07 | W39 | 02 | 0005 | Alpha | Aug 28, 2011 | Sep 4, 2011 | Sep 17, 2011 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1982, January to 2011, August. Gray background - average solar cycle.
