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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2351 | N22 | E36 | 04 | 0020 | Beta | May 25, 2015 | Jun 1, 2015 | Jun 14, 2015 |
| № 2348 | S10 | W18 | 01 | 0080 | Alpha | May 20, 2015 | May 27, 2015 | Jun 10, 2015 |
| № 2346 | S06 | W53 | 04 | 0010 | Beta | May 18, 2015 | May 25, 2015 | Jun 7, 2015 |
| № 2344 | S10 | W65 | 01 | 0010 | Beta | May 17, 2015 | May 24, 2015 | Jun 6, 2015 |
| № 2342 | N18 | W90 | 01 | 0010 | Beta | May 15, 2015 | May 22, 2015 | Jun 5, 2015 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1986 to May 2015. The gray background is the average SSN index.
