Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9312 | N08 | E49 | 01 | 0020 | Alpha | Jan 23, 2001 | Jan 29, 2001 | Feb 12, 2001 |
| № 9311 | N04 | E27 | 06 | 0040 | Beta | Jan 21, 2001 | Jan 28, 2001 | Feb 10, 2001 |
| № 9308 | N16 | W39 | 07 | 0080 | Beta | Jan 16, 2001 | Jan 23, 2001 | Feb 5, 2001 |
| № 9306 | N13 | W64 | 17 | 0130 | Beta-Gamma | Jan 14, 2001 | Jan 21, 2001 | Feb 3, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to January 2001. The gray background is the average SSN index.
