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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 8, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8435 | N13 | E20 | 02 | 0010 | BETA | Jan 10, 1999 | Jan 17, 1999 | Jan 31, 1999 |
| № 8434 | S26 | E48 | 07 | 0020 | BETA | Jan 13, 1999 | Jan 20, 1999 | Feb 3, 1999 |
| № 8433 | S28 | E12 | 04 | 0020 | BETA | Jan 10, 1999 | Jan 17, 1999 | Jan 31, 1999 |
| № 8432 | N28 | W62 | 02 | 0010 | BETA | Jan 4, 1999 | Jan 11, 1999 | Jan 25, 1999 |
| № 8431 | S28 | E33 | 04 | 0030 | BETA | Jan 11, 1999 | Jan 18, 1999 | Feb 2, 1999 |
| № 8430 | S26 | E11 | 06 | 0020 | BETA | Jan 10, 1999 | Jan 17, 1999 | Jan 31, 1999 |
| № 8428 | N22 | W76 | 01 | 0010 | ALPHA | Jan 3, 1999 | Jan 10, 1999 | Jan 24, 1999 |
| № 8426 | N15 | W35 | 08 | 0140 | BETA | Jan 6, 1999 | Jan 13, 1999 | Jan 27, 1999 |
| № 8425 | S22 | W59 | 01 | 0000 | ALPHA | Jan 4, 1999 | Jan 11, 1999 | Jan 25, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to January 1999. The gray background is the average SSN index.
