Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 18, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9354 | S08 | E22 | 08 | 0050 | Beta | Feb 21, 2001 | Feb 27, 2001 | Mar 13, 2001 |
| № 9353 | S23 | E05 | 06 | 0010 | Beta | Feb 19, 2001 | Feb 26, 2001 | Mar 12, 2001 |
| № 9352 | S22 | E38 | 03 | 0010 | Beta | Feb 22, 2001 | Mar 1, 2001 | Mar 15, 2001 |
| № 9350 | N18 | W07 | 01 | 0080 | Alpha | Feb 18, 2001 | Feb 25, 2001 | Mar 11, 2001 |
| № 9349 | N28 | W29 | 01 | 0010 | Alpha | Feb 17, 2001 | Feb 24, 2001 | Mar 10, 2001 |
| № 9348 | N17 | W81 | 04 | 0050 | Beta | Feb 13, 2001 | Feb 20, 2001 | Mar 5, 2001 |
| № 9347 | N05 | W39 | 02 | 0020 | Alpha | Feb 16, 2001 | Feb 23, 2001 | Mar 8, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to February 2001. The gray background is the average SSN index.
