Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 1, 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 | S10 | E18 | 11 | 0070 | Beta | Feb 3, 2005 | Feb 10, 2005 | Feb 24, 2005 |
| № 728 | S11 | W12 | 01 | 0000 | Alpha | Feb 1, 2005 | Feb 8, 2005 | Feb 21, 2005 |
| № 727 | S09 | W53 | 07 | 0110 | Beta | Jan 29, 2005 | Feb 5, 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.
