Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 31, 2017. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2661 | N06 | E88 | 01 | 0030 | Alpha | Jun 8, 2017 | Jun 15, 2017 | Jun 28, 2017 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1988 to May 2017. The gray background is the average SSN index.
