Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 9, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 751 | S08 | W57 | 01 | 0020 | Alpha | Apr 6, 2005 | Apr 12, 2005 | Apr 26, 2005 |
| № 750 | S07 | E38 | 09 | 0150 | Beta | Apr 13, 2005 | Apr 19, 2005 | May 3, 2005 |
| № 749 | S06 | W00 | 02 | 0020 | Alpha | Apr 10, 2005 | Apr 17, 2005 | Apr 30, 2005 |
| № 747 | S04 | W89 | 04 | 0060 | Beta | Apr 3, 2005 | Apr 10, 2005 | Apr 23, 2005 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1976 to April 2005. The gray background is the average SSN index.
