Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1460 | N15 | E42 | 05 | 0020 | null | Apr 21, 2012 | Apr 28, 2012 | May 12, 2012 |
| № 1459 | S15 | E58 | 12 | 0260 | Beta | Apr 22, 2012 | Apr 29, 2012 | May 13, 2012 |
| № 1458 | N06 | E43 | 02 | 0010 | Beta | Apr 21, 2012 | Apr 28, 2012 | May 11, 2012 |
| № 1457 | N20 | E05 | 01 | 0010 | Alpha | Apr 18, 2012 | Apr 25, 2012 | May 9, 2012 |
| № 1455 | N06 | W57 | 16 | 0200 | Beta | Apr 14, 2012 | Apr 20, 2012 | May 4, 2012 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1983 to April 2012. The gray background is the average SSN index.
