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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 4, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8217 | S16 | E57 | 01 | 0060 | ALPHA | May 10, 1998 | May 16, 1998 | May 30, 1998 |
| № 8216 | S22 | E09 | 02 | 0000 | ALPHA | May 6, 1998 | May 13, 1998 | May 27, 1998 |
| № 8214 | N27 | E03 | 50 | 0300 | BETA | May 5, 1998 | May 12, 1998 | May 27, 1998 |
| № 8210 | S17 | W39 | 30 | 0410 | BETA-GAMMA | May 2, 1998 | May 9, 1998 | May 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.
