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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 8, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8406 | S27 | E71 | 03 | 0100 | BETA | Dec 15, 1998 | Dec 22, 1998 | Jan 5, 1999 |
| № 8405 | S16 | E49 | 09 | 0060 | BETA | Dec 13, 1998 | Dec 20, 1998 | Jan 2, 1999 |
| № 8404 | S23 | W12 | 16 | 0120 | BETA | Dec 8, 1998 | Dec 15, 1998 | Dec 29, 1998 |
| № 8403 | N20 | W02 | 01 | 0040 | ALPHA | Dec 9, 1998 | Dec 16, 1998 | Dec 30, 1998 |
| № 8402 | N17 | W17 | 10 | 0230 | BETA | Dec 8, 1998 | Dec 15, 1998 | Dec 28, 1998 |
| № 8399 | N29 | W66 | 02 | 0010 | ALPHA | Dec 4, 1998 | Dec 11, 1998 | Dec 25, 1998 |
| № 8398 | N20 | W86 | 01 | 0080 | ALPHA | Dec 2, 1998 | Dec 9, 1998 | Dec 23, 1998 |
| № 8397 | N16 | W36 | 06 | 0190 | BETA | Dec 6, 1998 | Dec 13, 1998 | Dec 27, 1998 |
| № 8395 | N19 | W78 | 05 | 0120 | BETA | Dec 3, 1998 | Dec 10, 1998 | Dec 24, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to December 1998. The gray background is the average SSN index.
