Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 4, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9337 | S27 | E76 | 01 | 0000 | Alpha | Feb 11, 2001 | Feb 18, 2001 | Mar 4, 2001 |
| № 9336 | S10 | W01 | 01 | 0000 | Alpha | Feb 5, 2001 | Feb 12, 2001 | Feb 25, 2001 |
| № 9335 | N09 | E68 | 05 | 0100 | Beta | Feb 10, 2001 | Feb 17, 2001 | Mar 2, 2001 |
| № 9334 | N11 | E54 | 09 | 0210 | Beta | Feb 9, 2001 | Feb 16, 2001 | Mar 1, 2001 |
| № 9333 | N26 | W39 | 03 | 0030 | Beta | Feb 2, 2001 | Feb 9, 2001 | Feb 23, 2001 |
| № 9332 | N09 | W32 | 04 | 0020 | Beta | Feb 3, 2001 | Feb 9, 2001 | Feb 23, 2001 |
| № 9330 | N26 | E18 | 17 | 0160 | Beta | Feb 6, 2001 | Feb 13, 2001 | Feb 27, 2001 |
| № 9329 | S09 | W14 | 03 | 0010 | Beta | Feb 4, 2001 | Feb 11, 2001 | Feb 24, 2001 |
| № 9327 | N18 | W47 | 05 | 0040 | Beta | Feb 1, 2001 | Feb 8, 2001 | Feb 22, 2001 |
| № 9325 | N11 | W60 | 01 | 0000 | Alpha | Jan 31, 2001 | Feb 7, 2001 | Feb 21, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to February 2001. The gray background is the average SSN index.
