Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 4, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 729 | S11 | W25 | 02 | 0020 | Alpha | Feb 3, 2005 | Feb 10, 2005 | Feb 24, 2005 |
| № 727 | S10 | W97 | 01 | 0030 | Alpha | Jan 29, 2005 | Feb 4, 2005 | Feb 18, 2005 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1976 to February 2005. The gray background is the average SSN index.
