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) | |
|---|---|---|---|---|---|---|---|---|
| № 674 | S10 | W35 | 04 | 0010 | Beta | Sep 20, 2004 | Sep 27, 2004 | Oct 11, 2004 |
| № 673 | S13 | W03 | 18 | 0310 | Beta | Sep 23, 2004 | Sep 29, 2004 | Oct 13, 2004 |
| № 672 | N05 | W83 | 07 | 0080 | Beta | Sep 17, 2004 | Sep 23, 2004 | Oct 7, 2004 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1975, January to 2004, September. Gray background - average solar cycle.
