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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 27, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8745 | S14 | E66 | 02 | 0170 | ALPHA | Nov 2, 1999 | Nov 9, 1999 | Nov 22, 1999 |
| № 8744 | N07 | E30 | 05 | 0000 | BETA | Oct 30, 1999 | Nov 6, 1999 | Nov 20, 1999 |
| № 8743 | S18 | E08 | 08 | 0050 | BETA | Oct 29, 1999 | Nov 4, 1999 | Nov 18, 1999 |
| № 8742 | N09 | E43 | 24 | 0480 | BETA | Oct 31, 1999 | Nov 7, 1999 | Nov 21, 1999 |
| № 8741 | S25 | E09 | 11 | 0140 | BETA | Oct 29, 1999 | Nov 5, 1999 | Nov 19, 1999 |
| № 8739 | S11 | W10 | 62 | 0800 | BETA-GAMMA-DELTA | Oct 27, 1999 | Nov 3, 1999 | Nov 17, 1999 |
| № 8738 | N17 | W53 | 03 | 0010 | BETA | Oct 24, 1999 | Oct 31, 1999 | Nov 14, 1999 |
| № 8737 | S15 | W78 | 05 | 0360 | BETA | Oct 22, 1999 | Oct 29, 1999 | Nov 12, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to October 1999. The gray background is the average SSN index.
