Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on March 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) | |
|---|---|---|---|---|---|---|---|---|
| № 743 | S08 | W17 | 07 | 0320 | Beta | Mar 17, 2005 | Mar 24, 2005 | Apr 6, 2005 |
| № 742 | S06 | W50 | 18 | 0350 | Beta-Gamma | Mar 14, 2005 | Mar 21, 2005 | Apr 4, 2005 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1976 to March 2005. The gray background is the average SSN index.
