Active areas
Sunspots and active regions
By the end of the day, the following active regions with sunspots could be observed on the Sun's surface
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 9163 | S19 | W10 | 03 | 0010 | BETA | Sep 13, 2000 | Sep 20, 2000 | Oct 4, 2000 |
| № 9162 | S34 | W36 | 04 | 0020 | BETA | Sep 11, 2000 | Sep 18, 2000 | Oct 3, 2000 |
| № 9161 | N05 | E38 | 01 | 0000 | ALPHA | Sep 17, 2000 | Sep 24, 2000 | Oct 7, 2000 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1971, January to 2000, September. Gray background - average solar cycle.
