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) | |
|---|---|---|---|---|---|---|---|---|
| № 711 | N13 | W20 | 04 | 0020 | Beta | Dec 10, 2004 | Dec 17, 2004 | Dec 31, 2004 |
| № 710 | S08 | E22 | 04 | 0010 | Beta | Dec 14, 2004 | Dec 20, 2004 | Jan 3, 2005 |
| № 709 | N05 | W38 | 01 | 0010 | Alpha | Dec 9, 2004 | Dec 16, 2004 | Dec 29, 2004 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1975, January to 2004, December. Gray background - average solar cycle.
