No image for the selected date
Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 1, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8784 | N30 | E34 | 04 | 0020 | BETA | Dec 5, 1999 | Dec 12, 1999 | Dec 26, 1999 |
| № 8783 | S16 | W41 | 05 | 0020 | BETA | Nov 29, 1999 | Dec 6, 1999 | Dec 19, 1999 |
| № 8782 | N11 | W39 | 23 | 0170 | BETA | Nov 29, 1999 | Dec 6, 1999 | Dec 19, 1999 |
| № 8781 | S12 | W01 | 21 | 0230 | BETA | Dec 2, 1999 | Dec 9, 1999 | Dec 22, 1999 |
| № 8780 | S16 | W24 | 01 | 0000 | ALPHA | Nov 30, 1999 | Dec 7, 1999 | Dec 21, 1999 |
| № 8778 | S14 | W60 | 13 | 0130 | BETA | Nov 27, 1999 | Dec 4, 1999 | Dec 18, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to December 1999. The gray background is the average SSN index.
