Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 18, 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 | E13 | 03 | 0030 | Beta | Dec 20, 2001 | Dec 27, 2001 | Jan 9, 2002 |
| № 9743 | S12 | E61 | 04 | 0160 | Alpha | Dec 23, 2001 | Dec 30, 2001 | Jan 13, 2002 |
| № 9742 | N08 | E53 | 17 | 0340 | Beta | Dec 23, 2001 | Dec 30, 2001 | Jan 12, 2002 |
| № 9741 | N05 | E19 | 06 | 0050 | Beta | Dec 20, 2001 | Dec 27, 2001 | Jan 10, 2002 |
| № 9739 | S13 | W55 | 17 | 0440 | Beta | Dec 15, 2001 | Dec 21, 2001 | Jan 4, 2002 |
| № 9738 | S18 | E03 | 18 | 0120 | Beta | Dec 19, 2001 | Dec 26, 2001 | Jan 9, 2002 |
| № 9737 | S28 | W35 | 03 | 0050 | Beta | Dec 16, 2001 | Dec 23, 2001 | Jan 6, 2002 |
| № 9734 | S15 | W21 | 02 | 0020 | Beta | Dec 17, 2001 | Dec 24, 2001 | Jan 7, 2002 |
| № 9733 | N14 | W46 | 44 | 0420 | Beta-Gamma | Dec 15, 2001 | Dec 22, 2001 | Jan 5, 2002 |
| № 9732 | N02 | W73 | 01 | 0090 | 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.
