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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 4, 2015. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2318 | N09 | E71 | 03 | 0020 | Beta | Apr 10, 2015 | Apr 17, 2015 | May 1, 2015 |
| № 2317 | N11 | W57 | 06 | 0050 | Beta | Apr 1, 2015 | Apr 7, 2015 | Apr 21, 2015 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1986 to April 2015. The gray background is the average SSN index.
