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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 23, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1198 | S25 | W52 | 03 | 0010 | Beta | Apr 20, 2011 | Apr 27, 2011 | May 11, 2011 |
| № 1196 | S25 | E53 | 06 | 0050 | Beta | Apr 28, 2011 | May 5, 2011 | May 19, 2011 |
| № 1195 | S18 | E29 | 25 | 0340 | Beta-Gamma | Apr 26, 2011 | May 3, 2011 | May 17, 2011 |
| № 1193 | N17 | W44 | 16 | 0190 | Beta | Apr 21, 2011 | Apr 27, 2011 | May 11, 2011 |
| № 1191 | N08 | W65 | 03 | 0010 | Alpha | Apr 19, 2011 | Apr 26, 2011 | May 9, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to April 2011. The gray background is the average SSN index.
