Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 17, 2006. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 908 | S13 | W71 | 03 | 0190 | Alpha | Sep 12, 2006 | Sep 19, 2006 | Oct 3, 2006 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1977 to September 2006. The gray background is the average SSN index.
