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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on March 13, 2007. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 946 | N07 | W72 | 01 | 0020 | Alpha | Mar 9, 2007 | Mar 15, 2007 | Mar 29, 2007 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1978 to March 2007. The gray background is the average SSN index.
