Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 19, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 662 | N12 | E28 | 03 | 0020 | Beta | Aug 22, 2004 | Aug 29, 2004 | Sep 12, 2004 |
| № 661 | N10 | E07 | 13 | 0540 | Beta-Gamma | Aug 21, 2004 | Aug 27, 2004 | Sep 10, 2004 |
| № 656 | S13 | W91 | 07 | 0190 | Beta | Aug 13, 2004 | Aug 20, 2004 | Sep 3, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to August 2004. The gray background is the average SSN index.
