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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 19, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1724 | S26 | E09 | 02 | 0020 | Beta | Apr 21, 2013 | Apr 28, 2013 | May 12, 2013 |
| № 1723 | S16 | W14 | 21 | 0190 | Beta | Apr 19, 2013 | Apr 26, 2013 | May 9, 2013 |
| № 1722 | S20 | W60 | 10 | 0090 | Beta | Apr 15, 2013 | Apr 22, 2013 | May 6, 2013 |
| № 1721 | S17 | W73 | 02 | 0100 | Beta | Apr 14, 2013 | Apr 21, 2013 | May 5, 2013 |
| № 1719 | N09 | W89 | 01 | 0050 | Alpha | Apr 13, 2013 | Apr 20, 2013 | May 3, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to April 2013. The gray background is the average SSN index.
