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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 28, 2015. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2427 | N18 | E51 | 10 | 0030 | Beta | Oct 3, 2015 | Oct 10, 2015 | Oct 23, 2015 |
| № 2426 | N16 | E24 | 01 | 0010 | Alpha | Oct 1, 2015 | Oct 8, 2015 | Oct 21, 2015 |
| № 2425 | S05 | W25 | 01 | 0000 | Alpha | Sep 27, 2015 | Oct 4, 2015 | Oct 17, 2015 |
| № 2424 | N12 | W56 | 01 | 0010 | Alpha | Sep 25, 2015 | Oct 1, 2015 | Oct 15, 2015 |
| № 2423 | S09 | W63 | 14 | 0100 | Beta-Gamma | Sep 24, 2015 | Oct 1, 2015 | Oct 14, 2015 |
| № 2422 | S20 | W14 | 25 | 0650 | Beta-Gamma-Delta | Sep 28, 2015 | Oct 5, 2015 | Oct 18, 2015 |
| № 2421 | N16 | W33 | 11 | 0100 | Beta | Sep 26, 2015 | Oct 3, 2015 | Oct 17, 2015 |
| № 2420 | N11 | W15 | 11 | 0110 | Beta | Sep 28, 2015 | Oct 5, 2015 | Oct 18, 2015 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1986 to September 2015. The gray background is the average SSN index.
