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) | |
|---|---|---|---|---|---|---|---|---|
| № 673 | S13 | W15 | 14 | 0260 | Beta | Sep 23, 2004 | Sep 30, 2004 | Oct 13, 2004 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1975, January to 2004, September. Gray background - average solar cycle.
