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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 2, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8323 | S23 | E11 | 41 | 1230 | BETA-GAMMA | Sep 4, 1998 | Sep 11, 1998 | Sep 25, 1998 |
| № 8322 | N23 | W52 | 06 | 0060 | BETA | Aug 30, 1998 | Sep 6, 1998 | Sep 20, 1998 |
| № 8321 | N31 | E12 | 05 | 0010 | BETA | Sep 4, 1998 | Sep 11, 1998 | Sep 25, 1998 |
| № 8319 | N19 | W68 | 24 | 0670 | BETA | Aug 29, 1998 | Sep 5, 1998 | Sep 18, 1998 |
| № 8307 | N32 | W90 | 03 | 0040 | BETA | Aug 27, 1998 | Sep 3, 1998 | Sep 17, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to September 1998. The gray background is the average SSN index.
