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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 21, 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 | N19 | E53 | 07 | 0130 | Beta | Sep 26, 2011 | Oct 3, 2011 | Oct 17, 2011 |
| № 1300 | N24 | W72 | 01 | 0070 | Alpha | Sep 16, 2011 | Sep 23, 2011 | Oct 7, 2011 |
| № 1299 | S20 | W39 | 07 | 0040 | Beta | Sep 19, 2011 | Sep 26, 2011 | Oct 10, 2011 |
| № 1298 | N15 | W35 | 03 | 0020 | Beta | Sep 19, 2011 | Sep 26, 2011 | Oct 10, 2011 |
| № 1296 | N27 | W15 | 05 | 0030 | Beta | Sep 21, 2011 | Sep 28, 2011 | Oct 12, 2011 |
| № 1295 | N23 | W34 | 18 | 0310 | Beta-Gamma | Sep 19, 2011 | Sep 26, 2011 | Oct 10, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to September 2011. The gray background is the average SSN index.
