Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 1, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1183 | N15 | E16 | 13 | 0140 | Beta | Apr 3, 2011 | Apr 10, 2011 | Apr 24, 2011 |
| № 1181 | S27 | W06 | 01 | 0010 | Alpha | Apr 1, 2011 | Apr 8, 2011 | Apr 22, 2011 |
| № 1180 | N24 | W11 | 01 | 0010 | Alpha | Apr 1, 2011 | Apr 8, 2011 | Apr 22, 2011 |
| № 1178 | S17 | W20 | 01 | 0000 | Alpha | Mar 31, 2011 | Apr 7, 2011 | Apr 21, 2011 |
| № 1176 | S16 | W49 | 10 | 0140 | Beta | Mar 29, 2011 | Apr 5, 2011 | Apr 19, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to April 2011. The gray background is the average SSN index.
