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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 23, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2333 | N19 | E64 | 01 | 0030 | Alpha | Apr 29, 2015 | May 6, 2015 | May 19, 2015 |
| № 2332 | S13 | W29 | 05 | 0020 | Beta | Apr 22, 2015 | Apr 28, 2015 | May 12, 2015 |
| № 2331 | S10 | W02 | 15 | 0040 | Beta | Apr 24, 2015 | Apr 30, 2015 | May 14, 2015 |
| № 2329 | S08 | W91 | 08 | 0050 | Beta | Apr 17, 2015 | Apr 24, 2015 | May 7, 2015 |
| № 2327 | S10 | E05 | 03 | 0090 | Alpha | Apr 24, 2015 | May 1, 2015 | May 15, 2015 |
| № 2325 | N06 | W37 | 07 | 0205 | Beta | Apr 21, 2015 | Apr 28, 2015 | May 11, 2015 |
| № 2324 | N19 | W45 | 14 | 0165 | Beta | Apr 20, 2015 | Apr 27, 2015 | May 11, 2015 |
| № 2321 | N07 | W71 | 01 | 0030 | Alpha | Apr 19, 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.
