Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 28, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 739 | S04 | E38 | 02 | 0020 | Alpha | Mar 4, 2005 | Mar 11, 2005 | Mar 24, 2005 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1976 to February 2005. The gray background is the average SSN index.
