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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 18, 2012. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1462 | S23 | W05 | 07 | 0030 | Beta | Apr 18, 2012 | Apr 25, 2012 | May 9, 2012 |
| № 1461 | N13 | E68 | 01 | 0040 | Alpha | Apr 24, 2012 | May 1, 2012 | May 14, 2012 |
| № 1460 | N16 | E28 | 06 | 0050 | Beta | Apr 21, 2012 | Apr 28, 2012 | May 11, 2012 |
| № 1459 | S15 | E42 | 11 | 0150 | Beta | Apr 22, 2012 | Apr 29, 2012 | May 13, 2012 |
| № 1455 | N05 | W76 | 03 | 0030 | Beta | Apr 13, 2012 | Apr 20, 2012 | May 3, 2012 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1983 to April 2012. The gray background is the average SSN index.
