Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 13, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9163 | S19 | W08 | 03 | 0010 | BETA | Sep 13, 2000 | Sep 20, 2000 | Oct 4, 2000 |
| № 9162 | S34 | W34 | 04 | 0020 | BETA | Sep 11, 2000 | Sep 18, 2000 | Oct 3, 2000 |
| № 9161 | N05 | E40 | 01 | 0000 | ALPHA | Sep 17, 2000 | Sep 24, 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.
