Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9744 | S06 | E27 | 06 | 0030 | Beta | Dec 20, 2001 | Dec 27, 2001 | Jan 9, 2002 |
| № 9743 | S11 | E75 | 02 | 0240 | Alpha | Dec 24, 2001 | Dec 30, 2001 | Jan 13, 2002 |
| № 9742 | N08 | E66 | 11 | 0470 | Beta | Dec 23, 2001 | Dec 30, 2001 | Jan 12, 2002 |
| № 9741 | N05 | E32 | 04 | 0020 | Beta | Dec 20, 2001 | Dec 27, 2001 | Jan 10, 2002 |
| № 9739 | S13 | W41 | 15 | 0390 | Beta | Dec 15, 2001 | Dec 22, 2001 | Jan 4, 2002 |
| № 9738 | S19 | E17 | 12 | 0060 | Beta | Dec 19, 2001 | Dec 26, 2001 | Jan 9, 2002 |
| № 9737 | S28 | W22 | 04 | 0040 | Beta | Dec 16, 2001 | Dec 23, 2001 | Jan 6, 2002 |
| № 9734 | S15 | W07 | 02 | 0010 | Alpha | Dec 17, 2001 | Dec 24, 2001 | Jan 7, 2002 |
| № 9733 | N14 | W34 | 47 | 0420 | Beta-Gamma | Dec 15, 2001 | Dec 22, 2001 | Jan 5, 2002 |
| № 9732 | N02 | W60 | 01 | 0060 | Alpha | Dec 13, 2001 | Dec 20, 2001 | Jan 3, 2002 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to December 2001. The gray background is the average SSN index.
