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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8171 | S24 | E07 | 03 | 0010 | BETA | Mar 1, 1998 | Mar 8, 1998 | Mar 22, 1998 |
| № 8170 | N00 | E04 | 01 | 0000 | ALPHA | Mar 1, 1998 | Mar 8, 1998 | Mar 21, 1998 |
| № 8169 | S19 | W42 | 03 | 0010 | BETA | Feb 26, 1998 | Mar 5, 1998 | Mar 18, 1998 |
| № 8167 | S26 | W20 | 09 | 0030 | BETA | Feb 27, 1998 | Mar 6, 1998 | Mar 20, 1998 |
| № 8164 | N17 | W35 | 15 | 0090 | BETA | Feb 26, 1998 | Mar 5, 1998 | Mar 19, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to February 1998. The gray background is the average SSN index.
