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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8227 | N26 | E50 | 06 | 0280 | ALPHA | Jun 2, 1998 | Jun 9, 1998 | Jun 23, 1998 |
| № 8226 | N18 | W64 | 11 | 0280 | BETA | May 24, 1998 | May 31, 1998 | Jun 14, 1998 |
| № 8225 | S18 | E10 | 02 | 0010 | ALPHA | May 30, 1998 | Jun 5, 1998 | Jun 19, 1998 |
| № 8224 | S24 | W88 | 02 | 0020 | BETA | May 22, 1998 | May 29, 1998 | Jun 12, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to May 1998. The gray background is the average SSN index.
