Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 11, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 659 | N17 | E60 | 05 | 0030 | Beta | Aug 16, 2004 | Aug 23, 2004 | Sep 6, 2004 |
| № 657 | N11 | E26 | 01 | 0030 | Alpha | Aug 14, 2004 | Aug 21, 2004 | Sep 3, 2004 |
| № 656 | S12 | E19 | 43 | 0700 | Beta-Gamma-Delta | Aug 13, 2004 | Aug 20, 2004 | Sep 3, 2004 |
| № 655 | S10 | W82 | 04 | 0100 | 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.
