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) | |
|---|---|---|---|---|---|---|---|---|
| № 668 | S10 | W47 | 06 | 0050 | Beta | Sep 2, 2004 | Sep 9, 2004 | Sep 23, 2004 |
| № 667 | S10 | E38 | 02 | 0340 | Alpha | Sep 9, 2004 | Sep 16, 2004 | Sep 29, 2004 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1975, January to 2004, September. Gray background - average solar cycle.
