Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 21, 2005. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 723 | N06 | E37 | 01 | 0080 | Alpha | Jan 25, 2005 | Jan 31, 2005 | Feb 14, 2005 |
| № 720 | N14 | W68 | 27 | 1400 | Beta-Gamma-Delta | Jan 17, 2005 | Jan 24, 2005 | Feb 6, 2005 |
| № 718 | S07 | W86 | 03 | 0100 | Beta | Jan 15, 2005 | Jan 22, 2005 | Feb 5, 2005 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1976 to January 2005. The gray background is the average SSN index.
