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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 6, 1999. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8432 | N27 | W33 | 02 | 0010 | BETA | Jan 4, 1999 | Jan 11, 1999 | Jan 25, 1999 |
| № 8431 | S28 | E58 | 01 | 0030 | ALPHA | Jan 11, 1999 | Jan 18, 1999 | Feb 1, 1999 |
| № 8428 | N22 | W46 | 07 | 0050 | BETA | Jan 3, 1999 | Jan 10, 1999 | Jan 24, 1999 |
| № 8426 | N15 | W08 | 12 | 0150 | BETA | Jan 6, 1999 | Jan 13, 1999 | Jan 27, 1999 |
| № 8422 | S22 | W78 | 01 | 0070 | ALPHA | Jan 1, 1999 | Jan 8, 1999 | Jan 22, 1999 |
| № 8421 | N26 | W87 | 04 | 0180 | BETA | Dec 31, 1998 | Jan 7, 1999 | Jan 21, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to January 1999. The gray background is the average SSN index.
