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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 1, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1836 | N11 | E21 | 09 | 0170 | Beta-Gamma | Sep 3, 2013 | Sep 10, 2013 | Sep 24, 2013 |
| № 1835 | S11 | W11 | 09 | 0140 | Beta | Sep 1, 2013 | Sep 8, 2013 | Sep 21, 2013 |
| № 1834 | N13 | W18 | 12 | 0030 | Beta | Aug 31, 2013 | Sep 7, 2013 | Sep 21, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to September 2013. The gray background is the average SSN index.
