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) | |
|---|---|---|---|---|---|---|---|---|
| № 1289 | N23 | E67 | 03 | 0280 | Beta | Sep 14, 2011 | Sep 21, 2011 | Oct 5, 2011 |
| № 1287 | S30 | E10 | 01 | 0100 | Alpha | Sep 10, 2011 | Sep 17, 2011 | Oct 1, 2011 |
| № 1283 | N14 | W31 | 14 | 0230 | Beta-Gamma-Delta | Sep 7, 2011 | Sep 13, 2011 | Sep 27, 2011 |
| № 1281 | S15 | W58 | 02 | 0010 | Beta | Sep 5, 2011 | Sep 11, 2011 | Sep 25, 2011 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1982, January to 2011, September. Gray background - average solar cycle.
