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) | |
|---|---|---|---|---|---|---|---|---|
| № 1187 | S19 | E64 | 01 | 0010 | Alpha | Apr 14, 2011 | Apr 21, 2011 | May 4, 2011 |
| № 1186 | N22 | E46 | 08 | 0060 | Beta | Apr 12, 2011 | Apr 19, 2011 | May 3, 2011 |
| № 1185 | N24 | E26 | 06 | 0050 | Beta | Apr 11, 2011 | Apr 18, 2011 | May 2, 2011 |
| № 1184 | N16 | W55 | 07 | 0160 | Beta | Apr 5, 2011 | Apr 12, 2011 | Apr 25, 2011 |
| № 1183 | N14 | W81 | 01 | 0010 | Alpha | Apr 3, 2011 | Apr 10, 2011 | Apr 23, 2011 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1982, January to 2011, April. Gray background - average solar cycle.
