Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1572 | N15 | W70 | 01 | 0010 | Alpha | Sep 12, 2012 | Sep 19, 2012 | Oct 2, 2012 |
| № 1571 | S13 | E19 | 03 | 0100 | Beta | Sep 18, 2012 | Sep 25, 2012 | Oct 9, 2012 |
| № 1569 | S12 | W00 | 08 | 0180 | Beta-Gamma | Sep 17, 2012 | Sep 24, 2012 | Oct 7, 2012 |
| № 1566 | N23 | W76 | 01 | 0010 | Alpha | Sep 11, 2012 | Sep 18, 2012 | Oct 2, 2012 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1983 to September 2012. The gray background is the average SSN index.
