Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 23, 2009. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1027 | N24 | E34 | 04 | 0040 | Beta | Sep 26, 2009 | Oct 3, 2009 | Oct 17, 2009 |
| № 1026 | S30 | E56 | 02 | 0030 | Beta | Sep 28, 2009 | Oct 5, 2009 | Oct 20, 2009 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1980 to September 2009. The gray background is the average SSN index.
