Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 9, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 658 | S05 | E38 | 01 | 0010 | Alpha | Aug 13, 2004 | Aug 20, 2004 | Sep 2, 2004 |
| № 657 | N11 | E51 | 01 | 0040 | Alpha | Aug 14, 2004 | Aug 21, 2004 | Sep 3, 2004 |
| № 656 | S12 | E45 | 20 | 0290 | Beta-Gamma | Aug 13, 2004 | Aug 20, 2004 | Sep 3, 2004 |
| № 655 | S10 | W54 | 15 | 0150 | Beta | Aug 6, 2004 | Aug 13, 2004 | Aug 26, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to August 2004. The gray background is the average SSN index.
