Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 31, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1025 | N17 | E45 | 02 | 0010 | Beta | Sep 4, 2009 | Sep 11, 2009 | Sep 25, 2009 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1980 to August 2009. The gray background is the average SSN index.
