Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 4, 2005. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 805 | S11 | W17 | 04 | 0060 | Beta | Sep 4, 2005 | Sep 11, 2005 | Sep 24, 2005 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1976 to September 2005. The gray background is the average SSN index.
