Active areas
Sunspots and active regions
By the end of the day, the following active regions with sunspots could be observed on the Sun's surface
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 2643 | N08 | E56 | 02 | 0030 | Alpha | Mar 28, 2017 | Apr 4, 2017 | Apr 18, 2017 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1988, January to 2017, March. Gray background - average solar cycle.
