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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8210 | S17 | E44 | 09 | 0200 | BETA-DELTA | May 2, 1998 | May 9, 1998 | May 23, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to April 1998. The gray background is the average SSN index.
