Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 31, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9332 | N08 | E26 | 03 | 0020 | Beta | Feb 3, 2001 | Feb 10, 2001 | Feb 23, 2001 |
| № 9331 | N13 | E29 | 03 | 0050 | Beta | Feb 3, 2001 | Feb 10, 2001 | Feb 23, 2001 |
| № 9330 | N24 | E69 | 01 | 0100 | Alpha | Feb 6, 2001 | Feb 13, 2001 | Feb 27, 2001 |
| № 9329 | S10 | E38 | 05 | 0020 | Beta | Feb 4, 2001 | Feb 11, 2001 | Feb 24, 2001 |
| № 9328 | N06 | W85 | 03 | 0050 | Alpha | Jan 25, 2001 | Feb 1, 2001 | Feb 15, 2001 |
| № 9327 | N18 | E08 | 09 | 0050 | Beta | Feb 1, 2001 | Feb 8, 2001 | Feb 22, 2001 |
| № 9325 | N10 | W02 | 04 | 0030 | Beta | Feb 1, 2001 | Feb 7, 2001 | Feb 21, 2001 |
| № 9321 | S06 | W49 | 20 | 0150 | Beta | Jan 28, 2001 | Feb 4, 2001 | Feb 17, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to January 2001. The gray background is the average SSN index.
