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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 23, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9171 | S15 | E71 | 01 | 0040 | ALPHA | Sep 29, 2000 | Oct 6, 2000 | Oct 20, 2000 |
| № 9170 | S07 | E16 | 18 | 0070 | BETA | Sep 25, 2000 | Oct 2, 2000 | Oct 15, 2000 |
| № 9169 | N10 | E20 | 102 | 1880 | BETA-GAMMA-DELTA | Sep 25, 2000 | Oct 2, 2000 | Oct 16, 2000 |
| № 9167 | N13 | E04 | 18 | 0170 | BETA | Sep 24, 2000 | Oct 1, 2000 | Oct 15, 2000 |
| № 9166 | S12 | W29 | 48 | 0610 | BETA | Sep 22, 2000 | Sep 29, 2000 | Oct 12, 2000 |
| № 9165 | N15 | W92 | 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.
