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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 24, 1998. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8421 | N29 | E80 | 02 | 0090 | ALPHA | Dec 31, 1998 | Jan 7, 1999 | Jan 21, 1999 |
| № 8420 | N18 | E64 | 01 | 0010 | ALPHA | Dec 30, 1998 | Jan 6, 1999 | Jan 19, 1999 |
| № 8419 | N28 | E25 | 04 | 0020 | BETA | Dec 27, 1998 | Jan 3, 1999 | Jan 17, 1999 |
| № 8416 | N20 | E31 | 10 | 0090 | BETA | Dec 27, 1998 | Jan 3, 1999 | Jan 17, 1999 |
| № 8415 | N22 | W02 | 11 | 0040 | BETA | Dec 25, 1998 | Jan 1, 1999 | Jan 15, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to December 1998. The gray background is the average SSN index.
