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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 30, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8349 | S26 | E50 | 01 | 0000 | ALPHA | Oct 5, 1998 | Oct 12, 1998 | Oct 26, 1998 |
| № 8348 | N16 | E62 | 01 | 0000 | ALPHA | Oct 6, 1998 | Oct 12, 1998 | Oct 26, 1998 |
| № 8347 | S12 | W32 | 02 | 0020 | BETA | Sep 28, 1998 | Oct 5, 1998 | Oct 19, 1998 |
| № 8346 | S28 | W23 | 08 | 0020 | BETA | Sep 29, 1998 | Oct 6, 1998 | Oct 20, 1998 |
| № 8344 | S21 | W73 | 02 | 0020 | BETA | Sep 25, 1998 | Oct 2, 1998 | Oct 16, 1998 |
| № 8340 | N19 | W80 | 01 | 0230 | ALPHA | Sep 25, 1998 | Oct 2, 1998 | Oct 15, 1998 |
| № 8338 | N31 | W82 | 01 | 0040 | ALPHA | Sep 24, 1998 | Oct 1, 1998 | Oct 16, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to September 1998. The gray background is the average SSN index.
