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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 16, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1459 | S16 | E66 | 03 | 0080 | Beta | Apr 22, 2012 | Apr 29, 2012 | May 12, 2012 |
| № 1458 | N06 | E57 | 02 | 0010 | Beta | Apr 21, 2012 | Apr 28, 2012 | May 11, 2012 |
| № 1457 | N21 | E16 | 02 | 0010 | Alpha | Apr 18, 2012 | Apr 25, 2012 | May 9, 2012 |
| № 1455 | N05 | W44 | 19 | 0170 | Beta | Apr 14, 2012 | Apr 20, 2012 | May 4, 2012 |
| № 1454 | S12 | E02 | 01 | 0000 | Alpha | Apr 17, 2012 | Apr 24, 2012 | May 7, 2012 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1983 to April 2012. The gray background is the average SSN index.
