Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 6, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 750 | S08 | E84 | 01 | 0120 | Alpha | Apr 13, 2005 | Apr 20, 2005 | May 4, 2005 |
| № 749 | S06 | E38 | 01 | 0020 | Alpha | Apr 10, 2005 | Apr 17, 2005 | Apr 30, 2005 |
| № 748 | N12 | W06 | 02 | 0020 | Alpha | Apr 7, 2005 | Apr 13, 2005 | Apr 27, 2005 |
| № 747 | S05 | W47 | 12 | 0130 | Beta | Apr 3, 2005 | Apr 10, 2005 | Apr 24, 2005 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1976 to April 2005. The gray background is the average SSN index.
