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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on March 21, 2015. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2304 | N16 | W45 | 05 | 0010 | Beta | Mar 19, 2015 | Mar 25, 2015 | Apr 8, 2015 |
| № 2303 | N19 | E25 | 02 | 0110 | Alpha | Mar 24, 2015 | Mar 31, 2015 | Apr 14, 2015 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1986 to March 2015. The gray background is the average SSN index.
