Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 20, 2001. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9747 | N12 | E73 | 02 | 0030 | Beta | Dec 26, 2001 | Jan 2, 2002 | Jan 16, 2002 |
| № 9746 | S18 | E10 | 02 | 0020 | Beta | Dec 22, 2001 | Dec 28, 2001 | Jan 11, 2002 |
| № 9745 | N18 | E50 | 04 | 0030 | Beta | Dec 25, 2001 | Jan 1, 2002 | Jan 14, 2002 |
| № 9743 | S10 | E36 | 02 | 0120 | Alpha | Dec 24, 2001 | Dec 30, 2001 | Jan 13, 2002 |
| № 9742 | N12 | E29 | 24 | 0320 | Beta-Gamma | Dec 23, 2001 | Dec 30, 2001 | Jan 12, 2002 |
| № 9741 | N07 | W07 | 04 | 0020 | Beta | Dec 20, 2001 | Dec 27, 2001 | Jan 10, 2002 |
| № 9739 | S14 | W80 | 07 | 0270 | Beta | Dec 15, 2001 | Dec 22, 2001 | Jan 4, 2002 |
| № 9738 | S19 | W19 | 08 | 0040 | Beta-Gamma | Dec 19, 2001 | Dec 26, 2001 | Jan 9, 2002 |
| № 9733 | N13 | W73 | 15 | 0310 | Beta-Gamma | Dec 15, 2001 | Dec 22, 2001 | Jan 5, 2002 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to December 2001. The gray background is the average SSN index.
