Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 17, 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 | S09 | E32 | 01 | 0000 | Alpha | Feb 21, 2001 | Feb 27, 2001 | Mar 13, 2001 |
| № 9353 | S23 | E15 | 02 | 0010 | Alpha | Feb 19, 2001 | Feb 26, 2001 | Mar 12, 2001 |
| № 9352 | S22 | E49 | 02 | 0010 | Beta | Feb 22, 2001 | Mar 1, 2001 | Mar 15, 2001 |
| № 9351 | S23 | W55 | 02 | 0030 | Beta | Feb 14, 2001 | Feb 21, 2001 | Mar 7, 2001 |
| № 9350 | N18 | E02 | 01 | 0060 | Alpha | Feb 18, 2001 | Feb 25, 2001 | Mar 11, 2001 |
| № 9349 | N28 | W20 | 01 | 0030 | Alpha | Feb 17, 2001 | Feb 24, 2001 | Mar 10, 2001 |
| № 9348 | N15 | W75 | 07 | 0110 | Beta | Feb 12, 2001 | Feb 19, 2001 | Mar 5, 2001 |
| № 9347 | N04 | W31 | 03 | 0010 | Beta | Feb 16, 2001 | Feb 23, 2001 | Mar 8, 2001 |
| № 9342 | S23 | W67 | 02 | 0000 | Beta | Feb 13, 2001 | Feb 20, 2001 | Mar 6, 2001 |
| № 9339 | S11 | W94 | 01 | 0060 | Alpha | Feb 11, 2001 | Feb 18, 2001 | Mar 3, 2001 |
| № 9338 | S22 | W96 | 01 | 0060 | Alpha | Feb 11, 2001 | Feb 18, 2001 | Mar 4, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to February 2001. The gray background is the average SSN index.
