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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 8, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1720 | N11 | W06 | 04 | 0020 | Beta | Apr 8, 2013 | Apr 15, 2013 | Apr 29, 2013 |
| № 1719 | N08 | E55 | 06 | 0150 | Beta-Gamma | Apr 13, 2013 | Apr 20, 2013 | May 3, 2013 |
| № 1718 | N20 | E22 | 14 | 0140 | Beta-Gamma | Apr 11, 2013 | Apr 17, 2013 | May 1, 2013 |
| № 1717 | S13 | E39 | 01 | 0010 | Alpha | Apr 12, 2013 | Apr 19, 2013 | May 2, 2013 |
| № 1716 | S20 | E06 | 02 | 0010 | Beta | Apr 9, 2013 | Apr 16, 2013 | Apr 30, 2013 |
| № 1715 | N18 | W51 | 01 | 0000 | Alpha | Apr 5, 2013 | Apr 12, 2013 | Apr 26, 2013 |
| № 1714 | N12 | E04 | 06 | 0060 | Beta | Apr 9, 2013 | Apr 16, 2013 | Apr 30, 2013 |
| № 1713 | N11 | W45 | 13 | 0120 | Beta-Gamma | Apr 5, 2013 | Apr 12, 2013 | Apr 26, 2013 |
| № 1711 | S19 | W26 | 07 | 0400 | Beta | Apr 7, 2013 | Apr 14, 2013 | Apr 27, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to April 2013. The gray background is the average SSN index.
