Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2316 | S21 | E16 | 01 | 0010 | Alpha | Apr 3, 2015 | Apr 10, 2015 | Apr 24, 2015 |
| № 2315 | S21 | W53 | 03 | 0020 | Beta | Mar 29, 2015 | Apr 5, 2015 | Apr 19, 2015 |
| № 2313 | N18 | W26 | 03 | 0010 | Beta | Mar 31, 2015 | Apr 7, 2015 | Apr 21, 2015 |
| № 2305 | S11 | W64 | 06 | 0310 | Beta | Mar 28, 2015 | Apr 4, 2015 | Apr 18, 2015 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1986 to April 2015. The gray background is the average SSN index.
