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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 9, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8153 | S40 | E40 | 02 | 0010 | BETA | Feb 13, 1998 | Feb 21, 1998 | Mar 7, 1998 |
| № 8152 | S21 | W84 | 04 | 0030 | BETA | Feb 3, 1998 | Feb 10, 1998 | Feb 24, 1998 |
| № 8151 | S22 | E13 | 01 | 0040 | ALPHA | Feb 11, 1998 | Feb 18, 1998 | Mar 4, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to February 1998. The gray background is the average SSN index.
