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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 9, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8120 | S22 | E35 | 05 | 0030 | BETA | Dec 13, 1997 | Dec 20, 1997 | Jan 2, 1998 |
| № 8119 | N32 | W00 | 06 | 0020 | BETA | Dec 10, 1997 | Dec 17, 1997 | Dec 31, 1997 |
| № 8118 | S38 | E37 | 05 | 0020 | BETA | Dec 13, 1997 | Dec 20, 1997 | Jan 4, 1998 |
| № 8117 | N22 | E23 | 03 | 0020 | BETA | Dec 12, 1997 | Dec 19, 1997 | Jan 2, 1998 |
| № 8116 | N25 | W03 | 04 | 0050 | BETA | Dec 10, 1997 | Dec 17, 1997 | Dec 31, 1997 |
| № 8115 | N34 | W59 | 03 | 0020 | BETA | Dec 5, 1997 | Dec 12, 1997 | Dec 27, 1997 |
| № 8113 | N19 | W87 | 01 | 0110 | ALPHA | Dec 3, 1997 | Dec 10, 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.
