Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 13, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1192 | N11 | E01 | 02 | 0020 | Beta | Apr 14, 2011 | Apr 21, 2011 | May 4, 2011 |
| № 1191 | N09 | E73 | 01 | 0060 | Alpha | Apr 19, 2011 | Apr 26, 2011 | May 10, 2011 |
| № 1190 | N15 | E14 | 20 | 0110 | Beta-Gamma | Apr 15, 2011 | Apr 22, 2011 | May 5, 2011 |
| № 1187 | S20 | E01 | 05 | 0020 | Beta | Apr 14, 2011 | Apr 21, 2011 | May 5, 2011 |
| № 1186 | N22 | W18 | 16 | 0090 | Beta | Apr 12, 2011 | Apr 19, 2011 | May 3, 2011 |
| № 1185 | N16 | W32 | 10 | 0040 | Beta | Apr 11, 2011 | Apr 18, 2011 | May 2, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to April 2011. The gray background is the average SSN index.
