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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 20, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1301 | N20 | E64 | 05 | 0110 | Beta | Sep 26, 2011 | Oct 3, 2011 | Oct 16, 2011 |
| № 1300 | N24 | W57 | 05 | 0070 | Beta | Sep 17, 2011 | Sep 23, 2011 | Oct 7, 2011 |
| № 1299 | S19 | W27 | 13 | 0060 | Beta | Sep 19, 2011 | Sep 26, 2011 | Oct 9, 2011 |
| № 1298 | N14 | W21 | 02 | 0020 | Alpha | Sep 19, 2011 | Sep 26, 2011 | Oct 10, 2011 |
| № 1296 | N26 | W04 | 08 | 0050 | Alpha | Sep 21, 2011 | Sep 28, 2011 | Oct 12, 2011 |
| № 1295 | N22 | W22 | 24 | 0300 | Beta-Gamma | Sep 19, 2011 | Sep 26, 2011 | Oct 10, 2011 |
| № 1289 | N23 | W92 | 01 | 0120 | Alpha | Sep 14, 2011 | Sep 21, 2011 | Oct 5, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to September 2011. The gray background is the average SSN index.
