Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 21, 2019. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2739 | N06 | W67 | 01 | 0010 | Alpha | Apr 17, 2019 | Apr 24, 2019 | May 7, 2019 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1990 to April 2019. The gray background is the average SSN index.
