Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 28, 2004. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 664 | S11 | W58 | 01 | 0090 | Alpha | Aug 25, 2004 | Aug 31, 2004 | Sep 14, 2004 |
| № 663 | N10 | W27 | 12 | 0080 | Beta | Aug 27, 2004 | Sep 3, 2004 | Sep 16, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to August 2004. The gray background is the average SSN index.
