Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 21, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9169 | N10 | E48 | 46 | 1940 | BETA-GAMMA-DELTA | Sep 25, 2000 | Oct 2, 2000 | Oct 16, 2000 |
| № 9167 | N12 | E32 | 16 | 0210 | BETA | Sep 24, 2000 | Oct 1, 2000 | Oct 15, 2000 |
| № 9166 | S13 | W00 | 50 | 0590 | BETA-GAMMA | Sep 22, 2000 | Sep 29, 2000 | Oct 12, 2000 |
| № 9165 | N16 | W64 | 08 | 0060 | BETA | Sep 17, 2000 | Sep 24, 2000 | Oct 8, 2000 |
| № 9161 | N07 | W69 | 01 | 0000 | ALPHA | Sep 17, 2000 | Sep 23, 2000 | Oct 7, 2000 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1971 to September 2000. The gray background is the average SSN index.
