Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 735 | S07 | W11 | 17 | 0470 | Beta-Gamma-Delta | Feb 18, 2005 | Feb 24, 2005 | Mar 10, 2005 |
| № 734 | S04 | W28 | 05 | 0080 | Beta | Feb 16, 2005 | Feb 23, 2005 | Mar 9, 2005 |
| № 733 | S08 | W44 | 09 | 0170 | Alpha | Feb 15, 2005 | Feb 22, 2005 | Mar 7, 2005 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1976 to February 2005. The gray background is the average SSN index.
