Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 13, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9350 | N18 | E56 | 01 | 0060 | Alpha | Feb 18, 2001 | Feb 25, 2001 | Mar 11, 2001 |
| № 9349 | N28 | E34 | 01 | 0030 | Alpha | Feb 17, 2001 | Feb 24, 2001 | Mar 10, 2001 |
| № 9348 | N13 | W20 | 03 | 0020 | Beta | Feb 12, 2001 | Feb 19, 2001 | Mar 5, 2001 |
| № 9347 | N04 | E25 | 03 | 0050 | Beta | Feb 16, 2001 | Feb 23, 2001 | Mar 8, 2001 |
| № 9339 | S09 | W33 | 04 | 0100 | Beta | Feb 12, 2001 | Feb 18, 2001 | Mar 4, 2001 |
| № 9338 | S20 | W41 | 11 | 0170 | Beta | Feb 11, 2001 | Feb 18, 2001 | Mar 4, 2001 |
| № 9335 | N11 | W55 | 01 | 0010 | Alpha | Feb 10, 2001 | Feb 17, 2001 | Mar 2, 2001 |
| № 9334 | N13 | W65 | 02 | 0030 | Beta | Feb 9, 2001 | Feb 16, 2001 | Mar 2, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to February 2001. The gray background is the average SSN index.
