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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on March 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2301 | S16 | W29 | 02 | 0010 | Alpha | Mar 16, 2015 | Mar 23, 2015 | Apr 5, 2015 |
| № 2299 | S04 | E03 | 01 | 0000 | Alpha | Mar 18, 2015 | Mar 25, 2015 | Apr 8, 2015 |
| № 2297 | S17 | W54 | 24 | 0380 | Beta-Gamma-Delta | Mar 14, 2015 | Mar 21, 2015 | Apr 4, 2015 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1986 to March 2015. The gray background is the average SSN index.
