Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 15, 2008. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 990 | N26 | E22 | 01 | 0010 | Alpha | Apr 18, 2008 | Apr 25, 2008 | May 9, 2008 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1979 to April 2008. The gray background is the average SSN index.
