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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 31, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8231 | S21 | E31 | 04 | 0010 | BETA | Jun 4, 1998 | Jun 10, 1998 | Jun 24, 1998 |
| № 8230 | S19 | E58 | 05 | 0040 | BETA | Jun 6, 1998 | Jun 12, 1998 | Jun 26, 1998 |
| № 8228 | S22 | W28 | 04 | 0010 | BETA | May 30, 1998 | Jun 6, 1998 | Jun 20, 1998 |
| № 8227 | N26 | E07 | 09 | 0170 | BETA | Jun 2, 1998 | Jun 9, 1998 | Jun 23, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to May 1998. The gray background is the average SSN index.
