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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2330 | N15 | E32 | 03 | 0030 | Beta | Apr 24, 2015 | May 1, 2015 | May 15, 2015 |
| № 2329 | S08 | W62 | 08 | 0040 | Beta | Apr 17, 2015 | Apr 24, 2015 | May 8, 2015 |
| № 2327 | S09 | E30 | 04 | 0110 | Beta | Apr 24, 2015 | May 1, 2015 | May 15, 2015 |
| № 2326 | N15 | W41 | 01 | 0010 | Alpha | Apr 19, 2015 | Apr 26, 2015 | May 9, 2015 |
| № 2325 | N05 | W09 | 08 | 0220 | Beta | Apr 21, 2015 | Apr 28, 2015 | May 12, 2015 |
| № 2324 | N19 | W16 | 09 | 0230 | Beta | Apr 21, 2015 | Apr 28, 2015 | May 11, 2015 |
| № 2322 | N11 | W71 | 03 | 0030 | Beta | Apr 17, 2015 | Apr 23, 2015 | May 7, 2015 |
| № 2321 | N10 | W49 | 09 | 0080 | Beta | 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.
