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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 28, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8146 | N16 | E26 | 08 | 0020 | BETA | Jan 31, 1998 | Feb 7, 1998 | Feb 20, 1998 |
| № 8145 | N28 | E26 | 06 | 0020 | BETA | Jan 31, 1998 | Feb 7, 1998 | Feb 21, 1998 |
| № 8144 | N13 | E21 | 03 | 0010 | ALPHA | Jan 30, 1998 | Feb 6, 1998 | Feb 20, 1998 |
| № 8143 | S36 | E12 | 21 | 0260 | BETA-GAMMA | Jan 30, 1998 | Feb 6, 1998 | Feb 21, 1998 |
| № 8142 | S21 | W63 | 10 | 0110 | BETA | Jan 24, 1998 | Jan 31, 1998 | Feb 14, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to January 1998. The gray background is the average SSN index.
