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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 25, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8742 | N08 | E68 | 08 | 0280 | BETA | Oct 31, 1999 | Nov 7, 1999 | Nov 20, 1999 |
| № 8741 | S26 | E36 | 17 | 0220 | BETA | Oct 29, 1999 | Nov 5, 1999 | Nov 19, 1999 |
| № 8739 | S12 | E16 | 36 | 0420 | BETA-GAMMA | Oct 27, 1999 | Nov 3, 1999 | Nov 17, 1999 |
| № 8738 | N18 | W27 | 06 | 0030 | BETA | Oct 24, 1999 | Oct 31, 1999 | Nov 14, 1999 |
| № 8737 | S13 | W54 | 13 | 0330 | BETA | Oct 22, 1999 | Oct 29, 1999 | Nov 11, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to October 1999. The gray background is the average SSN index.
