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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 9, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1189 | N23 | E13 | 06 | 0040 | Beta | Apr 11, 2011 | Apr 18, 2011 | May 2, 2011 |
| № 1188 | S25 | W04 | 03 | 0020 | Beta | Apr 10, 2011 | Apr 17, 2011 | Apr 30, 2011 |
| № 1187 | S18 | E52 | 04 | 0030 | Beta | Apr 14, 2011 | Apr 21, 2011 | May 4, 2011 |
| № 1186 | N22 | E39 | 08 | 0050 | Beta | Apr 13, 2011 | Apr 20, 2011 | May 4, 2011 |
| № 1185 | N20 | E16 | 14 | 0020 | Beta | Apr 11, 2011 | Apr 18, 2011 | May 2, 2011 |
| № 1184 | N15 | W66 | 02 | 0170 | Alpha | Apr 5, 2011 | Apr 12, 2011 | Apr 25, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to April 2011. The gray background is the average SSN index.
