Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2657 | N07 | E17 | 02 | 0010 | Alpha | May 20, 2017 | May 26, 2017 | Jun 9, 2017 |
| № 2656 | N12 | E58 | 01 | 0030 | Alpha | May 23, 2017 | May 29, 2017 | Jun 12, 2017 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1988 to May 2017. The gray background is the average SSN index.
