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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on March 31, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1711 | S17 | E79 | 04 | 0210 | Beta | Apr 7, 2013 | Apr 14, 2013 | Apr 27, 2013 |
| № 1710 | S21 | E36 | 07 | 0070 | Beta | Apr 4, 2013 | Apr 11, 2013 | Apr 24, 2013 |
| № 1708 | N11 | E47 | 04 | 0090 | Beta | Apr 4, 2013 | Apr 11, 2013 | Apr 25, 2013 |
| № 1707 | S11 | E06 | 02 | 0040 | Alpha | Apr 1, 2013 | Apr 8, 2013 | Apr 22, 2013 |
| № 1704 | N15 | W19 | 03 | 0070 | Alpha | Mar 30, 2013 | Apr 6, 2013 | Apr 20, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to March 2013. The gray background is the average SSN index.
