Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9167 | N12 | E82 | 01 | 0060 | ALPHA | Sep 24, 2000 | Oct 1, 2000 | Oct 14, 2000 |
| № 9166 | S14 | E52 | 20 | 0290 | BETA | Sep 22, 2000 | Sep 29, 2000 | Oct 12, 2000 |
| № 9165 | N13 | W12 | 45 | 0310 | BETA-GAMMA | Sep 17, 2000 | Sep 24, 2000 | Oct 7, 2000 |
| № 9164 | S15 | W54 | 07 | 0040 | BETA | Sep 14, 2000 | Sep 21, 2000 | Oct 4, 2000 |
| № 9161 | N06 | W13 | 13 | 0070 | BETA | Sep 17, 2000 | Sep 24, 2000 | Oct 7, 2000 |
| № 9156 | S28 | W80 | 02 | 0030 | ALPHA | Sep 12, 2000 | Sep 19, 2000 | Oct 3, 2000 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1971 to September 2000. The gray background is the average SSN index.
