Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 31, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 666 | N17 | E17 | 01 | 0000 | Alpha | Sep 2, 2004 | Sep 9, 2004 | Sep 23, 2004 |
| № 663 | N04 | W73 | 09 | 0140 | Beta | Aug 27, 2004 | Sep 2, 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.
