Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2326 | N15 | E14 | 07 | 0030 | Beta | Apr 19, 2015 | Apr 26, 2015 | May 9, 2015 |
| № 2325 | N05 | E46 | 04 | 0200 | Beta | Apr 21, 2015 | Apr 28, 2015 | May 12, 2015 |
| № 2324 | N18 | E36 | 06 | 0300 | Beta-Gamma | Apr 21, 2015 | Apr 27, 2015 | May 11, 2015 |
| № 2322 | N12 | W23 | 02 | 0010 | Beta | Apr 16, 2015 | Apr 23, 2015 | May 7, 2015 |
| № 2321 | N12 | E04 | 16 | 0380 | Beta-Gamma | Apr 18, 2015 | Apr 25, 2015 | May 9, 2015 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1986 to April 2015. The gray background is the average SSN index.
