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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1299 | S21 | E12 | 08 | 0030 | Beta | Sep 19, 2011 | Sep 26, 2011 | Oct 10, 2011 |
| № 1298 | N15 | E24 | 07 | 0070 | Beta | Sep 20, 2011 | Sep 27, 2011 | Oct 10, 2011 |
| № 1297 | S18 | W76 | 02 | 0060 | Beta | Sep 12, 2011 | Sep 19, 2011 | Oct 3, 2011 |
| № 1296 | N26 | E32 | 08 | 0130 | Beta | Sep 20, 2011 | Sep 27, 2011 | Oct 11, 2011 |
| № 1295 | N22 | E18 | 23 | 0240 | Beta-Gamma | Sep 19, 2011 | Sep 26, 2011 | Oct 10, 2011 |
| № 1294 | S16 | W30 | 01 | 0020 | Beta | Sep 16, 2011 | Sep 22, 2011 | Oct 6, 2011 |
| № 1293 | N17 | W64 | 02 | 0010 | Beta | Sep 13, 2011 | Sep 20, 2011 | Oct 4, 2011 |
| № 1292 | N09 | W03 | 01 | 0020 | Alpha | Sep 18, 2011 | Sep 24, 2011 | Oct 8, 2011 |
| № 1291 | N24 | W81 | 03 | 0090 | Beta | Sep 12, 2011 | Sep 19, 2011 | Oct 3, 2011 |
| № 1290 | S13 | W68 | 03 | 0010 | Beta | Sep 13, 2011 | Sep 20, 2011 | Oct 3, 2011 |
| № 1289 | N22 | W50 | 05 | 0310 | Beta | 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.
