Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 808 | S11 | W37 | 41 | 0620 | Beta-Gamma-Delta | Sep 15, 2005 | Sep 22, 2005 | Oct 6, 2005 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1976 to September 2005. The gray background is the average SSN index.
