Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 4, 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 | W30 | 11 | 0180 | Beta-Gamma | Oct 3, 2015 | Oct 10, 2015 | Oct 23, 2015 |
| № 2422 | S20 | W89 | 05 | 0270 | Beta | Sep 28, 2015 | Oct 5, 2015 | Oct 19, 2015 |
| № 2420 | N14 | W91 | 01 | 0030 | Alpha | Sep 28, 2015 | Oct 5, 2015 | Oct 19, 2015 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1986 to October 2015. The gray background is the average SSN index.
