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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 29, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8213 | S25 | E54 | 05 | 0010 | BETA | May 4, 1998 | May 11, 1998 | May 25, 1998 |
| № 8212 | S30 | W65 | 04 | 0020 | BETA | Apr 25, 1998 | May 2, 1998 | May 16, 1998 |
| № 8210 | S17 | E30 | 15 | 0300 | BETA-GAMMA-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.
