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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 6, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8329 | N15 | E52 | 09 | 0150 | BETA | Sep 11, 1998 | Sep 18, 1998 | Oct 1, 1998 |
| № 8328 | S17 | E58 | 02 | 0100 | ALPHA | Sep 11, 1998 | Sep 18, 1998 | Oct 2, 1998 |
| № 8327 | N30 | E52 | 03 | 0030 | ALPHA | Sep 11, 1998 | Sep 18, 1998 | Oct 2, 1998 |
| № 8326 | N21 | E50 | 06 | 0070 | BETA | Sep 11, 1998 | Sep 18, 1998 | Oct 2, 1998 |
| № 8323 | S22 | W23 | 31 | 1180 | 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.
