Active areas
Sunspots and active regions
By the end of the day, the following active regions with sunspots could be observed on the Sun's surface
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 750 | S08 | E86 | 01 | 0120 | Alpha | Apr 13, 2005 | Apr 20, 2005 | May 4, 2005 |
| № 749 | S06 | E40 | 01 | 0020 | Alpha | Apr 10, 2005 | Apr 17, 2005 | Apr 30, 2005 |
| № 748 | N12 | W04 | 02 | 0020 | Alpha | Apr 7, 2005 | Apr 13, 2005 | Apr 27, 2005 |
| № 747 | S05 | W45 | 12 | 0130 | Beta | Apr 3, 2005 | Apr 10, 2005 | Apr 24, 2005 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1976, January to 2005, April. Gray background - average solar cycle.
