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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 1, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2428 | S04 | W90 | 01 | 0010 | Alpha | Sep 25, 2015 | Oct 2, 2015 | Oct 15, 2015 |
| № 2427 | N18 | E11 | 12 | 0180 | Beta | Oct 3, 2015 | Oct 10, 2015 | Oct 23, 2015 |
| № 2422 | S18 | W53 | 23 | 0860 | Beta-Gamma-Delta | Sep 28, 2015 | Oct 5, 2015 | Oct 18, 2015 |
| № 2420 | N12 | W55 | 02 | 0040 | Beta | Sep 28, 2015 | Oct 4, 2015 | Oct 18, 2015 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1986 to October 2015. The gray background is the average SSN index.
