Active areas
Sunspots and active regions
By the end of the day, the following active regions with sunspots could be observed on the Sun's surface
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 672 | N05 | E48 | 30 | 0270 | Beta-Gamma | Sep 17, 2004 | Sep 23, 2004 | Oct 7, 2004 |
| № 671 | S09 | W93 | 02 | 0170 | Alpha | Sep 6, 2004 | Sep 13, 2004 | Sep 26, 2004 |
| № 669 | S06 | W50 | 08 | 0080 | Beta | Sep 9, 2004 | Sep 16, 2004 | Sep 29, 2004 |
| № 667 | S11 | W57 | 07 | 0180 | Beta | Sep 9, 2004 | Sep 15, 2004 | Sep 29, 2004 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1975, January to 2004, September. Gray background - average solar cycle.
