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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 9, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8332 | S27 | E12 | 03 | 0010 | BETA | Sep 11, 1998 | Sep 18, 1998 | Oct 2, 1998 |
| № 8331 | N24 | E51 | 06 | 0100 | BETA | Sep 14, 1998 | Sep 21, 1998 | Oct 5, 1998 |
| № 8330 | S22 | E44 | 03 | 0060 | BETA | Sep 13, 1998 | Sep 20, 1998 | Oct 4, 1998 |
| № 8329 | N14 | E11 | 24 | 0300 | BETA | Sep 11, 1998 | Sep 18, 1998 | Oct 1, 1998 |
| № 8328 | S18 | E20 | 11 | 0160 | BETA | Sep 12, 1998 | Sep 18, 1998 | Oct 2, 1998 |
| № 8327 | N29 | E14 | 03 | 0010 | BETA | Sep 11, 1998 | Sep 18, 1998 | Oct 2, 1998 |
| № 8326 | N22 | E12 | 17 | 0090 | BETA | Sep 11, 1998 | Sep 18, 1998 | Oct 2, 1998 |
| № 8323 | S22 | W64 | 17 | 0760 | 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.
