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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 13, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1456 | S20 | W17 | 04 | 0010 | Beta | Apr 13, 2012 | Apr 19, 2012 | May 3, 2012 |
| № 1455 | N06 | W03 | 13 | 0070 | Beta | Apr 14, 2012 | Apr 20, 2012 | May 4, 2012 |
| № 1454 | S12 | E45 | 03 | 0020 | Beta | Apr 17, 2012 | Apr 24, 2012 | May 8, 2012 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1983 to April 2012. The gray background is the average SSN index.
