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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on March 16, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1172 | N10 | E17 | 02 | 0010 | Beta | Mar 18, 2011 | Mar 25, 2011 | Apr 8, 2011 |
| № 1169 | N17 | W60 | 10 | 0340 | Beta-Gamma | Mar 12, 2011 | Mar 19, 2011 | Apr 2, 2011 |
| № 1166 | N12 | W91 | 05 | 0150 | Beta-Gamma | Mar 10, 2011 | Mar 17, 2011 | Mar 31, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to March 2011. The gray background is the average SSN index.
