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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 23, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1727 | N25 | E20 | 08 | 0070 | Beta | Apr 25, 2013 | May 2, 2013 | May 16, 2013 |
| № 1726 | N13 | W33 | 42 | 0550 | Beta-Gamma-Delta | Apr 21, 2013 | Apr 28, 2013 | May 12, 2013 |
| № 1723 | S19 | W68 | 03 | 0030 | Beta | Apr 19, 2013 | Apr 26, 2013 | May 9, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to April 2013. The gray background is the average SSN index.
