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) | |
|---|---|---|---|---|---|---|---|---|
| № 1285 | N29 | W46 | 01 | 0010 | Alpha | Aug 29, 2011 | Sep 5, 2011 | Sep 19, 2011 |
| № 1284 | S17 | W60 | 03 | 0010 | Beta | Aug 28, 2011 | Sep 4, 2011 | Sep 18, 2011 |
| № 1283 | N12 | E63 | 02 | 0100 | Beta | Sep 7, 2011 | Sep 13, 2011 | Sep 27, 2011 |
| № 1282 | N25 | W11 | 09 | 0050 | Beta | Sep 1, 2011 | Sep 8, 2011 | Sep 22, 2011 |
| № 1281 | S20 | E30 | 11 | 0100 | Beta | Sep 4, 2011 | Sep 11, 2011 | Sep 25, 2011 |
| № 1280 | N12 | W35 | 02 | 0010 | Beta | Aug 30, 2011 | Sep 6, 2011 | Sep 20, 2011 |
| № 1279 | N13 | W04 | 01 | 0080 | Alpha | Sep 2, 2011 | Sep 8, 2011 | Sep 22, 2011 |
| № 1277 | N18 | W12 | 01 | 0060 | Alpha | Sep 1, 2011 | Sep 8, 2011 | Sep 22, 2011 |
| № 1274 | N19 | W70 | 01 | 0030 | Alpha | Aug 28, 2011 | Sep 3, 2011 | Sep 17, 2011 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1982, January to 2011, September. Gray background - average solar cycle.
