Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 11, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1291 | N23 | W03 | 02 | 0010 | Beta | Sep 12, 2011 | Sep 19, 2011 | Oct 3, 2011 |
| № 1290 | S15 | E16 | 05 | 0050 | Beta | Sep 13, 2011 | Sep 20, 2011 | Oct 4, 2011 |
| № 1289 | N23 | E24 | 11 | 0450 | Beta | Sep 14, 2011 | Sep 21, 2011 | Oct 5, 2011 |
| № 1287 | S29 | W28 | 02 | 0070 | Alpha | Sep 10, 2011 | Sep 17, 2011 | Oct 1, 2011 |
| № 1283 | N13 | W73 | 07 | 0200 | Beta-Gamma | Sep 6, 2011 | Sep 13, 2011 | Sep 27, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to September 2011. The gray background is the average SSN index.
