Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 21, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9749 | S08 | E67 | 03 | 0080 | Beta | Dec 27, 2001 | Jan 3, 2002 | Jan 17, 2002 |
| № 9748 | S11 | E31 | 04 | 0030 | Beta | Dec 25, 2001 | Jan 1, 2002 | Jan 14, 2002 |
| № 9747 | N12 | E53 | 05 | 0090 | Beta | Dec 26, 2001 | Jan 2, 2002 | Jan 16, 2002 |
| № 9745 | N17 | E28 | 08 | 0030 | Beta | Dec 25, 2001 | Dec 31, 2001 | Jan 14, 2002 |
| № 9743 | S11 | E14 | 05 | 0120 | Beta | Dec 23, 2001 | Dec 30, 2001 | Jan 13, 2002 |
| № 9742 | N10 | E08 | 45 | 0530 | Beta-Gamma | Dec 23, 2001 | Dec 30, 2001 | Jan 12, 2002 |
| № 9741 | N05 | W26 | 05 | 0010 | Beta | Dec 20, 2001 | Dec 27, 2001 | Jan 10, 2002 |
| № 9738 | S18 | W39 | 03 | 0020 | Beta | Dec 19, 2001 | Dec 26, 2001 | Jan 9, 2002 |
| № 9733 | N12 | W88 | 03 | 0070 | Beta | Dec 16, 2001 | Dec 23, 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.
