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) | |
|---|---|---|---|---|---|---|---|---|
| № 1015 | N22 | W64 | 01 | 0010 | Alpha | Apr 18, 2009 | Apr 25, 2009 | May 9, 2009 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1980, January to 2009, April. Gray background - average solar cycle.
