Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 21, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 939 | S03 | W15 | 08 | 0100 | Beta | Jan 21, 2007 | Jan 27, 2007 | Feb 10, 2007 |
| № 938 | N04 | W25 | 03 | 0020 | Alpha | Jan 20, 2007 | Jan 27, 2007 | Feb 9, 2007 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1978 to January 2007. The gray background is the average SSN index.
