Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 9, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1720 | N10 | W21 | 05 | 0010 | Beta | Apr 8, 2013 | Apr 15, 2013 | Apr 29, 2013 |
| № 1719 | N07 | E39 | 16 | 0240 | Beta-Gamma | Apr 13, 2013 | Apr 20, 2013 | May 3, 2013 |
| № 1718 | N22 | E07 | 34 | 0220 | Beta | Apr 11, 2013 | Apr 17, 2013 | May 1, 2013 |
| № 1717 | S12 | E22 | 02 | 0010 | Beta | Apr 12, 2013 | Apr 18, 2013 | May 2, 2013 |
| № 1716 | S20 | W09 | 01 | 0010 | Alpha | Apr 9, 2013 | Apr 16, 2013 | Apr 30, 2013 |
| № 1714 | N14 | W12 | 03 | 0060 | Beta | Apr 9, 2013 | Apr 16, 2013 | Apr 30, 2013 |
| № 1713 | N09 | W61 | 16 | 0190 | Beta | Apr 5, 2013 | Apr 12, 2013 | Apr 26, 2013 |
| № 1711 | S16 | W42 | 05 | 0400 | 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.
