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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 21, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1878 | S10 | W52 | 02 | 0010 | Beta | Oct 18, 2013 | Oct 25, 2013 | Nov 7, 2013 |
| № 1877 | S13 | E57 | 08 | 0390 | Beta-Gamma | Oct 26, 2013 | Nov 2, 2013 | Nov 16, 2013 |
| № 1875 | N07 | E34 | 24 | 0150 | Beta-Gamma | Oct 24, 2013 | Oct 31, 2013 | Nov 14, 2013 |
| № 1874 | S11 | W18 | 10 | 0040 | Beta | Oct 20, 2013 | Oct 27, 2013 | Nov 10, 2013 |
| № 1873 | N12 | E11 | 12 | 0050 | Beta | Oct 23, 2013 | Oct 29, 2013 | Nov 12, 2013 |
| № 1872 | S17 | E03 | 01 | 0080 | Alpha | Oct 22, 2013 | Oct 29, 2013 | Nov 12, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to October 2013. The gray background is the average SSN index.
