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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 6, 1997. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8116 | N25 | E42 | 01 | 0000 | ALPHA | Dec 10, 1997 | Dec 17, 1997 | Dec 31, 1997 |
| № 8115 | N32 | W17 | 03 | 0020 | BETA | Dec 5, 1997 | Dec 13, 1997 | Dec 27, 1997 |
| № 8114 | S30 | W19 | 01 | 0000 | ALPHA | Dec 5, 1997 | Dec 12, 1997 | Dec 27, 1997 |
| № 8113 | N20 | W40 | 13 | 0330 | BETA | Dec 4, 1997 | Dec 11, 1997 | Dec 24, 1997 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1968 to December 1997. The gray background is the average SSN index.
