Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 31, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 728 | S13 | E03 | 02 | 0010 | Alpha | Feb 1, 2005 | Feb 8, 2005 | Feb 22, 2005 |
| № 727 | S09 | W40 | 16 | 0110 | Beta-Gamma | Jan 29, 2005 | Feb 5, 2005 | Feb 18, 2005 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1976 to January 2005. The gray background is the average SSN index.
