Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 11, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1722 | S20 | E46 | 03 | 0020 | Beta | Apr 15, 2013 | Apr 22, 2013 | May 6, 2013 |
| № 1721 | S18 | E37 | 04 | 0010 | Beta | Apr 15, 2013 | Apr 22, 2013 | May 5, 2013 |
| № 1719 | N10 | E15 | 17 | 0190 | Beta-Gamma | Apr 13, 2013 | Apr 20, 2013 | May 3, 2013 |
| № 1718 | N22 | W17 | 34 | 0280 | Beta-Gamma | Apr 11, 2013 | Apr 17, 2013 | May 1, 2013 |
| № 1717 | S10 | E01 | 03 | 0010 | Beta | Apr 12, 2013 | Apr 19, 2013 | May 2, 2013 |
| № 1716 | S20 | W35 | 01 | 0010 | Alpha | Apr 9, 2013 | Apr 16, 2013 | Apr 30, 2013 |
| № 1714 | N13 | W36 | 02 | 0020 | Alpha | Apr 9, 2013 | Apr 16, 2013 | Apr 30, 2013 |
| № 1713 | N08 | W86 | 07 | 0180 | Beta | Apr 5, 2013 | Apr 12, 2013 | Apr 26, 2013 |
| № 1711 | S17 | W65 | 02 | 0360 | Beta | Apr 7, 2013 | Apr 14, 2013 | Apr 27, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to April 2013. The gray background is the average SSN index.
