No image for the selected date
Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 21, 2013. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1754 | S16 | E52 | 01 | 0010 | Alpha | May 26, 2013 | Jun 2, 2013 | Jun 15, 2013 |
| № 1753 | N04 | E65 | 02 | 0060 | Beta | May 27, 2013 | Jun 3, 2013 | Jun 16, 2013 |
| № 1750 | S10 | W81 | 06 | 0100 | Beta | May 16, 2013 | May 23, 2013 | Jun 5, 2013 |
| № 1748 | N12 | W13 | 25 | 0140 | Beta-Gamma-Delta | May 21, 2013 | May 28, 2013 | Jun 10, 2013 |
| № 1746 | S29 | W49 | 04 | 0110 | Beta | May 18, 2013 | May 25, 2013 | Jun 8, 2013 |
| № 1745 | N13 | W51 | 04 | 0150 | Beta | May 18, 2013 | May 25, 2013 | Jun 7, 2013 |
| № 1744 | N06 | W77 | 01 | 0020 | Beta | May 16, 2013 | May 23, 2013 | Jun 5, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to May 2013. The gray background is the average SSN index.
