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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 20, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1576 | S22 | E64 | 04 | 0050 | Beta | Sep 26, 2012 | Oct 3, 2012 | Oct 17, 2012 |
| № 1575 | N10 | E64 | 04 | 0220 | Beta | Sep 26, 2012 | Oct 2, 2012 | Oct 16, 2012 |
| № 1574 | S25 | W55 | 01 | 0020 | Alpha | Sep 17, 2012 | Sep 24, 2012 | Oct 7, 2012 |
| № 1571 | S14 | W33 | 01 | 0030 | Alpha | Sep 18, 2012 | Sep 25, 2012 | Oct 9, 2012 |
| № 1569 | S14 | W53 | 02 | 0100 | Beta | Sep 17, 2012 | Sep 24, 2012 | Oct 7, 2012 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1983 to September 2012. The gray background is the average SSN index.
