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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on November 20, 1999. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8775 | S17 | W21 | 01 | 0010 | ALPHA | Nov 20, 1999 | Nov 26, 1999 | Dec 10, 1999 |
| № 8774 | N22 | E66 | 04 | 0030 | BETA | Nov 26, 1999 | Dec 3, 1999 | Dec 17, 1999 |
| № 8773 | S14 | E36 | 09 | 0030 | BETA | Nov 24, 1999 | Dec 1, 1999 | Dec 14, 1999 |
| № 8772 | N05 | E52 | 07 | 0060 | BETA | Nov 25, 1999 | Dec 2, 1999 | Dec 15, 1999 |
| № 8771 | S15 | E25 | 22 | 0150 | BETA-GAMMA | Nov 23, 1999 | Nov 30, 1999 | Dec 14, 1999 |
| № 8770 | S14 | W68 | 08 | 0090 | BETA | Nov 16, 1999 | Nov 23, 1999 | Dec 7, 1999 |
| № 8769 | S11 | E21 | 05 | 0040 | BETA | Nov 23, 1999 | Nov 30, 1999 | Dec 13, 1999 |
| № 8768 | N16 | W41 | 08 | 0150 | BETA | Nov 18, 1999 | Nov 25, 1999 | Dec 9, 1999 |
| № 8766 | N17 | W14 | 25 | 0250 | BETA-GAMMA | Nov 20, 1999 | Nov 27, 1999 | Dec 11, 1999 |
| № 8765 | S12 | W37 | 31 | 1120 | BETA-GAMMA-DELTA | Nov 18, 1999 | Nov 25, 1999 | Dec 9, 1999 |
| № 8759 | N12 | W82 | 04 | 0040 | BETA | Nov 15, 1999 | Nov 22, 1999 | Dec 5, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to November 1999. The gray background is the average SSN index.
