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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 4, 2013. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1714 | N13 | E54 | 01 | 0060 | Alpha | Apr 9, 2013 | Apr 16, 2013 | Apr 29, 2013 |
| № 1713 | N10 | E10 | 06 | 0030 | Beta | Apr 6, 2013 | Apr 12, 2013 | Apr 26, 2013 |
| № 1711 | S17 | E26 | 15 | 0560 | Beta | Apr 7, 2013 | Apr 14, 2013 | Apr 27, 2013 |
| № 1710 | S22 | W16 | 09 | 0120 | Beta | Apr 4, 2013 | Apr 11, 2013 | Apr 24, 2013 |
| № 1708 | N10 | W09 | 04 | 0020 | Beta | Apr 4, 2013 | Apr 11, 2013 | Apr 25, 2013 |
| № 1707 | S12 | W54 | 01 | 0010 | Alpha | Apr 1, 2013 | Apr 8, 2013 | Apr 21, 2013 |
| № 1704 | N15 | W72 | 03 | 0060 | Alpha | Mar 30, 2013 | Apr 6, 2013 | Apr 20, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to April 2013. The gray background is the average SSN index.
