Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on March 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1701 | N14 | W59 | 05 | 0020 | Beta | Mar 18, 2013 | Mar 24, 2013 | Apr 7, 2013 |
| № 1700 | S13 | E13 | 01 | 0010 | Alpha | Mar 23, 2013 | Mar 30, 2013 | Apr 12, 2013 |
| № 1699 | S15 | W87 | 02 | 0020 | Beta | Mar 15, 2013 | Mar 22, 2013 | Apr 5, 2013 |
| № 1695 | N10 | W51 | 04 | 0130 | Beta | Mar 18, 2013 | Mar 25, 2013 | Apr 8, 2013 |
| № 1692 | N09 | W71 | 08 | 0340 | Beta | Mar 17, 2013 | Mar 23, 2013 | Apr 6, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to March 2013. The gray background is the average SSN index.
