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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 18, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2327 | S10 | E71 | 03 | 0140 | Beta | Apr 24, 2015 | May 1, 2015 | May 15, 2015 |
| № 2326 | N15 | W01 | 06 | 0030 | Beta | Apr 19, 2015 | Apr 26, 2015 | May 9, 2015 |
| № 2325 | N04 | E33 | 08 | 0140 | Beta | Apr 21, 2015 | Apr 28, 2015 | May 12, 2015 |
| № 2324 | N19 | E24 | 09 | 0250 | Beta | Apr 21, 2015 | Apr 28, 2015 | May 11, 2015 |
| № 2321 | N11 | W07 | 17 | 0320 | Beta-Gamma | Apr 18, 2015 | Apr 25, 2015 | May 9, 2015 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1986 to April 2015. The gray background is the average SSN index.
