Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 4, 2012. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1453 | S17 | W11 | 05 | 0020 | Beta | Apr 4, 2012 | Apr 11, 2012 | Apr 25, 2012 |
| № 1452 | N18 | E33 | 03 | 0030 | Beta | Apr 8, 2012 | Apr 14, 2012 | Apr 28, 2012 |
| № 1450 | N16 | W04 | 13 | 0060 | Beta | Apr 5, 2012 | Apr 12, 2012 | Apr 25, 2012 |
| № 1445 | S22 | W71 | 01 | 0110 | Alpha | Mar 31, 2012 | Apr 6, 2012 | Apr 20, 2012 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1983 to April 2012. The gray background is the average SSN index.
