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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 29, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8747 | N10 | E57 | 04 | 0040 | BETA | Nov 3, 1999 | Nov 10, 1999 | Nov 24, 1999 |
| № 8746 | S15 | E12 | 04 | 0010 | BETA | Oct 31, 1999 | Nov 7, 1999 | Nov 21, 1999 |
| № 8745 | S15 | E40 | 07 | 0180 | BETA | Nov 2, 1999 | Nov 9, 1999 | Nov 23, 1999 |
| № 8744 | N10 | E01 | 03 | 0010 | BETA | Oct 30, 1999 | Nov 6, 1999 | Nov 20, 1999 |
| № 8743 | S15 | W20 | 04 | 0010 | BETA | Oct 29, 1999 | Nov 4, 1999 | Nov 18, 1999 |
| № 8742 | N08 | E15 | 29 | 0460 | BETA | Oct 31, 1999 | Nov 7, 1999 | Nov 21, 1999 |
| № 8741 | S25 | W18 | 19 | 0150 | BETA | Oct 29, 1999 | Nov 5, 1999 | Nov 19, 1999 |
| № 8739 | S11 | W39 | 35 | 0590 | BETA-GAMMA | Oct 27, 1999 | Nov 3, 1999 | Nov 17, 1999 |
| № 8738 | N17 | W82 | 01 | 0000 | ALPHA | Oct 24, 1999 | Oct 31, 1999 | Nov 13, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to October 1999. The gray background is the average SSN index.
