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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 13, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1295 | N21 | E74 | 01 | 0030 | Alpha | Sep 20, 2011 | Sep 26, 2011 | Oct 10, 2011 |
| № 1294 | S18 | E29 | 02 | 0010 | Beta | Sep 16, 2011 | Sep 23, 2011 | Oct 7, 2011 |
| № 1293 | N17 | W09 | 03 | 0020 | Beta | Sep 13, 2011 | Sep 20, 2011 | Oct 4, 2011 |
| № 1292 | N08 | E54 | 03 | 0010 | Beta | Sep 18, 2011 | Sep 25, 2011 | Oct 8, 2011 |
| № 1290 | S15 | W09 | 10 | 0070 | Beta | Sep 13, 2011 | Sep 20, 2011 | Oct 4, 2011 |
| № 1289 | N22 | E02 | 06 | 0300 | Beta | Sep 14, 2011 | Sep 21, 2011 | Oct 5, 2011 |
| № 1287 | S29 | W51 | 02 | 0050 | Beta | Sep 10, 2011 | Sep 17, 2011 | Oct 1, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to September 2011. The gray background is the average SSN index.
