Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 31, 2000. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8851 | N27 | E42 | 03 | 0020 | BETA | Feb 4, 2000 | Feb 11, 2000 | Feb 25, 2000 |
| № 8850 | S18 | E25 | 02 | 0010 | BETA | Feb 3, 2000 | Feb 10, 2000 | Feb 23, 2000 |
| № 8849 | S17 | W06 | 03 | 0020 | BETA | Feb 1, 2000 | Feb 7, 2000 | Feb 21, 2000 |
| № 8848 | S09 | E27 | 05 | 0070 | BETA | Feb 3, 2000 | Feb 10, 2000 | Feb 23, 2000 |
| № 8847 | S25 | W84 | 02 | 0030 | BETA | Jan 25, 2000 | Feb 1, 2000 | Feb 15, 2000 |
| № 8845 | S16 | W48 | 01 | 0020 | ALPHA | Jan 28, 2000 | Feb 4, 2000 | Feb 18, 2000 |
| № 8841 | S30 | W47 | 04 | 0090 | BETA | Jan 28, 2000 | Feb 4, 2000 | Feb 19, 2000 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1971 to January 2000. The gray background is the average SSN index.
