Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 13, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9738 | S21 | E67 | 03 | 0050 | Beta | Dec 19, 2001 | Dec 26, 2001 | Jan 9, 2002 |
| № 9737 | S28 | E26 | 08 | 0080 | Beta | Dec 16, 2001 | Dec 23, 2001 | Jan 6, 2002 |
| № 9736 | S09 | W55 | 07 | 0090 | Beta | Dec 10, 2001 | Dec 17, 2001 | Dec 30, 2001 |
| № 9735 | N05 | W61 | 02 | 0020 | Beta | Dec 9, 2001 | Dec 16, 2001 | Dec 30, 2001 |
| № 9734 | S12 | E38 | 02 | 0030 | Beta | Dec 17, 2001 | Dec 24, 2001 | Jan 6, 2002 |
| № 9733 | N14 | E18 | 42 | 0560 | Beta-Gamma-Delta | Dec 15, 2001 | Dec 22, 2001 | Jan 5, 2002 |
| № 9732 | N04 | W05 | 05 | 0080 | Beta | Dec 14, 2001 | Dec 20, 2001 | Jan 3, 2002 |
| № 9727 | S21 | W52 | 23 | 0600 | Beta-Gamma-Delta | Dec 10, 2001 | Dec 17, 2001 | Dec 31, 2001 |
| № 9724 | N09 | W75 | 01 | 0030 | Alpha | Dec 8, 2001 | Dec 15, 2001 | Dec 29, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to December 2001. The gray background is the average SSN index.
