Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 13, 2004. Coordinates are given as of the end of the day.
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 711 | N13 | W47 | 16 | 0100 | Beta | Dec 10, 2004 | Dec 17, 2004 | Dec 31, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to December 2004. The gray background is the average SSN index.
