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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 21, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2437 | S20 | E46 | 04 | 0050 | Beta | Oct 26, 2015 | Nov 1, 2015 | Nov 15, 2015 |
| № 2436 | N09 | E30 | 18 | 0240 | Beta-Delta | Oct 24, 2015 | Oct 31, 2015 | Nov 14, 2015 |
| № 2435 | S15 | E17 | 01 | 0020 | Alpha | Oct 23, 2015 | Oct 30, 2015 | Nov 13, 2015 |
| № 2434 | S10 | W22 | 14 | 0210 | Beta | Oct 20, 2015 | Oct 27, 2015 | Nov 10, 2015 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1986 to October 2015. The gray background is the average SSN index.
