Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1676 | S18 | E80 | 01 | 0030 | Alpha | Feb 24, 2013 | Mar 3, 2013 | Mar 17, 2013 |
| № 1675 | N12 | E33 | 09 | 0010 | Beta | Feb 20, 2013 | Feb 27, 2013 | Mar 13, 2013 |
| № 1673 | S10 | E58 | 11 | 0100 | Beta | Feb 22, 2013 | Mar 1, 2013 | Mar 15, 2013 |
| № 1672 | S17 | W27 | 01 | 0010 | Alpha | Feb 16, 2013 | Feb 23, 2013 | Mar 8, 2013 |
| № 1671 | N14 | W06 | 03 | 0090 | Beta | Feb 17, 2013 | Feb 24, 2013 | Mar 10, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to February 2013. The gray background is the average SSN index.
