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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 31, 2011. Coordinates are given as of the end of the day.
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 1284 | S19 | W57 | 01 | 0010 | Alpha | Aug 28, 2011 | Sep 4, 2011 | Sep 17, 2011 |
| № 1283 | N12 | E71 | 01 | 0060 | Alpha | Sep 6, 2011 | Sep 13, 2011 | Sep 27, 2011 |
| № 1282 | N24 | E01 | 03 | 0010 | Beta | Sep 1, 2011 | Sep 8, 2011 | Sep 22, 2011 |
| № 1281 | S20 | E40 | 05 | 0010 | Beta | Sep 4, 2011 | Sep 11, 2011 | Sep 25, 2011 |
| № 1279 | N13 | E07 | 02 | 0080 | Alpha | Sep 2, 2011 | Sep 8, 2011 | Sep 22, 2011 |
| № 1277 | N18 | W00 | 02 | 0050 | Alpha | Sep 1, 2011 | Sep 8, 2011 | Sep 22, 2011 |
| № 1274 | N18 | W59 | 05 | 0010 | Beta | Aug 28, 2011 | Sep 3, 2011 | Sep 17, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to August 2011. The gray background is the average SSN index.
