Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 27, 2011. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1200 | S17 | E42 | 04 | 0010 | Beta | May 1, 2011 | May 8, 2011 | May 22, 2011 |
| № 1199 | N21 | W23 | 08 | 0020 | Beta | Apr 26, 2011 | May 3, 2011 | May 17, 2011 |
| № 1196 | S28 | E02 | 01 | 0005 | Alpha | Apr 28, 2011 | May 5, 2011 | May 19, 2011 |
| № 1195 | S17 | W25 | 04 | 0210 | Beta | Apr 26, 2011 | May 3, 2011 | May 17, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to April 2011. The gray background is the average SSN index.
