Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 30, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1735 | S17 | W47 | 04 | 0030 | Beta | Apr 27, 2013 | May 4, 2013 | May 18, 2013 |
| № 1734 | S19 | E66 | 04 | 0090 | Beta | May 6, 2013 | May 13, 2013 | May 27, 2013 |
| № 1733 | S17 | W55 | 02 | 0030 | Beta | Apr 27, 2013 | May 4, 2013 | May 17, 2013 |
| № 1732 | S17 | E41 | 05 | 0130 | Beta | May 4, 2013 | May 11, 2013 | May 25, 2013 |
| № 1731 | N09 | E12 | 31 | 0350 | Beta-Gamma | May 2, 2013 | May 9, 2013 | May 22, 2013 |
| № 1730 | S18 | W19 | 19 | 0210 | Beta-Gamma-Delta | Apr 29, 2013 | May 6, 2013 | May 20, 2013 |
| № 1728 | N19 | W15 | 01 | 0020 | Alpha | Apr 30, 2013 | May 7, 2013 | May 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.
