Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 23, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2653 | S09 | E59 | 02 | 0100 | Alpha | Apr 28, 2017 | May 5, 2017 | May 19, 2017 |
| № 2651 | N12 | E19 | 07 | 0140 | Beta | Apr 25, 2017 | May 2, 2017 | May 16, 2017 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1988 to April 2017. The gray background is the average SSN index.
