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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 18, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1574 | S24 | W30 | 04 | 0040 | Beta | Sep 17, 2012 | Sep 23, 2012 | Oct 7, 2012 |
| № 1573 | N16 | E50 | 01 | 0000 | Alpha | Sep 23, 2012 | Sep 29, 2012 | Oct 13, 2012 |
| № 1571 | S13 | W06 | 03 | 0060 | Alpha | Sep 18, 2012 | Sep 25, 2012 | Oct 9, 2012 |
| № 1569 | S12 | W24 | 03 | 0120 | 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.
