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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8349 | S26 | E65 | 02 | 0010 | BETA | Oct 5, 1998 | Oct 12, 1998 | Oct 26, 1998 |
| № 8348 | N17 | E77 | 01 | 0010 | ALPHA | Oct 6, 1998 | Oct 13, 1998 | Oct 26, 1998 |
| № 8347 | S12 | W21 | 07 | 0020 | BETA | Sep 28, 1998 | Oct 5, 1998 | Oct 19, 1998 |
| № 8346 | S28 | W13 | 14 | 0050 | BETA | Sep 29, 1998 | Oct 6, 1998 | Oct 20, 1998 |
| № 8344 | S22 | W62 | 01 | 0040 | ALPHA | Sep 25, 1998 | Oct 2, 1998 | Oct 16, 1998 |
| № 8343 | N37 | W52 | 02 | 0010 | BETA | Sep 26, 1998 | Oct 3, 1998 | Oct 18, 1998 |
| № 8342 | N17 | W88 | 02 | 0050 | BETA | Sep 23, 1998 | Sep 30, 1998 | Oct 14, 1998 |
| № 8340 | N20 | W68 | 07 | 0320 | BETA | Sep 25, 1998 | Oct 2, 1998 | Oct 15, 1998 |
| № 8338 | N31 | W72 | 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.
