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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 1, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8401 | N12 | E29 | 03 | 0010 | BETA | Dec 4, 1998 | Dec 11, 1998 | Dec 24, 1998 |
| № 8400 | S18 | E10 | 02 | 0010 | BETA | Dec 3, 1998 | Dec 9, 1998 | Dec 23, 1998 |
| № 8399 | N30 | E25 | 04 | 0040 | BETA | Dec 4, 1998 | Dec 11, 1998 | Dec 25, 1998 |
| № 8398 | N18 | W03 | 12 | 0060 | BETA | Dec 2, 1998 | Dec 8, 1998 | Dec 22, 1998 |
| № 8397 | N15 | E66 | 09 | 0300 | BETA | Dec 7, 1998 | Dec 14, 1998 | Dec 27, 1998 |
| № 8396 | N28 | W93 | 03 | 0010 | BETA | Nov 25, 1998 | Dec 2, 1998 | Dec 16, 1998 |
| № 8395 | N22 | E13 | 55 | 0350 | BETA-GAMMA | Dec 3, 1998 | Dec 10, 1998 | Dec 24, 1998 |
| № 8393 | S18 | W14 | 18 | 0150 | BETA | Dec 1, 1998 | Dec 8, 1998 | Dec 21, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to December 1998. The gray background is the average SSN index.
