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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 5, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8328 | S18 | E74 | 02 | 0010 | ALPHA | Sep 11, 1998 | Sep 18, 1998 | Oct 2, 1998 |
| № 8327 | N28 | E66 | 01 | 0070 | ALPHA | Sep 11, 1998 | Sep 18, 1998 | Oct 2, 1998 |
| № 8326 | N18 | E62 | 03 | 0160 | BETA | Sep 11, 1998 | Sep 17, 1998 | Oct 1, 1998 |
| № 8323 | S22 | W11 | 27 | 1400 | BETA-GAMMA | Sep 5, 1998 | Sep 12, 1998 | Sep 26, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to September 1998. The gray background is the average SSN index.
