Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 21, 2002. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9794 | N11 | E65 | 01 | 0010 | Alpha | Jan 27, 2002 | Feb 3, 2002 | Feb 16, 2002 |
| № 9793 | S15 | E32 | 05 | 0020 | Beta | Jan 24, 2002 | Jan 31, 2002 | Feb 14, 2002 |
| № 9792 | N07 | E23 | 02 | 0010 | Beta | Jan 24, 2002 | Jan 31, 2002 | Feb 13, 2002 |
| № 9791 | S03 | W19 | 09 | 0030 | Beta | Jan 21, 2002 | Jan 27, 2002 | Feb 10, 2002 |
| № 9790 | N28 | E12 | 01 | 0000 | Alpha | Jan 23, 2002 | Jan 30, 2002 | Feb 13, 2002 |
| № 9789 | N15 | W15 | 07 | 0020 | Beta | Jan 21, 2002 | Jan 28, 2002 | Feb 10, 2002 |
| № 9788 | N17 | E27 | 16 | 0090 | Beta | Jan 24, 2002 | Jan 31, 2002 | Feb 14, 2002 |
| № 9787 | S07 | E46 | 06 | 0420 | Beta | Jan 25, 2002 | Feb 1, 2002 | Feb 15, 2002 |
| № 9786 | S25 | W45 | 06 | 0080 | Beta | Jan 19, 2002 | Jan 25, 2002 | Feb 8, 2002 |
| № 9785 | N11 | W39 | 06 | 0110 | Beta | Jan 19, 2002 | Jan 26, 2002 | Feb 8, 2002 |
| № 9783 | S11 | W25 | 06 | 0130 | Beta | Jan 20, 2002 | Jan 27, 2002 | Feb 10, 2002 |
| № 9782 | N08 | W48 | 03 | 0140 | Beta | Jan 18, 2002 | Jan 25, 2002 | Feb 8, 2002 |
| № 9781 | S04 | W55 | 02 | 0060 | Alpha | Jan 18, 2002 | Jan 25, 2002 | Feb 7, 2002 |
| № 9779 | N27 | W90 | 02 | 0030 | Alpha | Jan 15, 2002 | Jan 22, 2002 | Feb 5, 2002 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1973 to January 2002. The gray background is the average SSN index.
