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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 14, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8412 | S15 | W26 | 02 | 0010 | BETA | Dec 13, 1998 | Dec 20, 1998 | Jan 3, 1999 |
| № 8411 | S28 | E39 | 07 | 0030 | BETA | Dec 18, 1998 | Dec 25, 1998 | Jan 8, 1999 |
| № 8410 | N24 | E48 | 01 | 0060 | ALPHA | Dec 19, 1998 | Dec 26, 1998 | Jan 9, 1999 |
| № 8409 | S28 | E01 | 24 | 0190 | BETA-GAMMA | Dec 15, 1998 | Dec 22, 1998 | Jan 5, 1999 |
| № 8408 | S18 | W13 | 19 | 0190 | BETA-GAMMA-DELTA | Dec 14, 1998 | Dec 21, 1998 | Jan 4, 1999 |
| № 8406 | S26 | W09 | 02 | 0030 | BETA | Dec 14, 1998 | Dec 21, 1998 | Jan 4, 1999 |
| № 8404 | S24 | W86 | 05 | 0110 | BETA | Dec 8, 1998 | Dec 15, 1998 | Dec 29, 1998 |
| № 8403 | N20 | W80 | 01 | 0020 | ALPHA | Dec 9, 1998 | Dec 16, 1998 | Dec 30, 1998 |
| № 8402 | N17 | W93 | 01 | 0050 | ALPHA | Dec 8, 1998 | Dec 15, 1998 | Dec 28, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to December 1998. The gray background is the average SSN index.
