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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 18, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1928 | S15 | E08 | 12 | 0130 | Beta-Gamma | Dec 20, 2013 | Dec 26, 2013 | Jan 9, 2014 |
| № 1927 | S26 | W86 | 02 | 0010 | Beta | Dec 12, 2013 | Dec 19, 2013 | Jan 2, 2014 |
| № 1921 | N07 | W30 | 05 | 0250 | Beta | Dec 17, 2013 | Dec 24, 2013 | Jan 6, 2014 |
| № 1920 | N12 | W35 | 01 | 0050 | Alpha | Dec 16, 2013 | Dec 23, 2013 | Jan 6, 2014 |
| № 1918 | S09 | W43 | 02 | 0070 | Alpha | Dec 16, 2013 | Dec 23, 2013 | Jan 5, 2014 |
| № 1917 | S15 | W64 | 09 | 0250 | Beta-Gamma | Dec 14, 2013 | Dec 21, 2013 | Jan 4, 2014 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to December 2013. The gray background is the average SSN index.
