Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 2, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1712 | N02 | E23 | 01 | 0010 | Alpha | Apr 5, 2013 | Apr 11, 2013 | Apr 25, 2013 |
| № 1711 | S20 | E52 | 06 | 0480 | Beta | Apr 7, 2013 | Apr 14, 2013 | Apr 28, 2013 |
| № 1710 | S22 | E07 | 07 | 0010 | Beta | Apr 4, 2013 | Apr 10, 2013 | Apr 24, 2013 |
| № 1708 | N11 | E16 | 02 | 0040 | Alpha | Apr 4, 2013 | Apr 11, 2013 | Apr 25, 2013 |
| № 1707 | S10 | W28 | 04 | 0030 | Beta | Apr 1, 2013 | Apr 8, 2013 | Apr 21, 2013 |
| № 1704 | N14 | W47 | 04 | 0080 | Beta | Mar 30, 2013 | Apr 6, 2013 | Apr 20, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to April 2013. The gray background is the average SSN index.
