Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 21, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1465 | S17 | E40 | 06 | 0210 | Beta | Apr 25, 2012 | May 2, 2012 | May 16, 2012 |
| № 1464 | N23 | W12 | 02 | 0010 | Beta | Apr 21, 2012 | Apr 28, 2012 | May 12, 2012 |
| № 1463 | S26 | W64 | 09 | 0100 | Beta | Apr 17, 2012 | Apr 24, 2012 | May 8, 2012 |
| № 1462 | S25 | W45 | 14 | 0410 | Beta | Apr 18, 2012 | Apr 25, 2012 | May 9, 2012 |
| № 1461 | N12 | E25 | 02 | 0010 | Beta | Apr 24, 2012 | May 1, 2012 | May 14, 2012 |
| № 1460 | N15 | W14 | 19 | 0450 | Beta | Apr 21, 2012 | Apr 28, 2012 | May 11, 2012 |
| № 1459 | S16 | E02 | 40 | 0400 | Beta | Apr 22, 2012 | Apr 29, 2012 | May 13, 2012 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1983 to April 2012. The gray background is the average SSN index.
