Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 15, 2018. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2704 | N12 | E24 | 01 | 0010 | Alpha | Apr 18, 2018 | Apr 25, 2018 | May 8, 2018 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1989 to April 2018. The gray background is the average SSN index.
