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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 12, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8357 | S34 | E35 | 01 | 0000 | ALPHA | Oct 16, 1998 | Oct 23, 1998 | Nov 6, 1998 |
| № 8356 | N21 | W40 | 09 | 0010 | BETA | Oct 10, 1998 | Oct 17, 1998 | Oct 30, 1998 |
| № 8355 | S22 | E12 | 16 | 0110 | BETA | Oct 14, 1998 | Oct 21, 1998 | Nov 4, 1998 |
| № 8350 | N20 | W51 | 02 | 0080 | ALPHA | Oct 9, 1998 | Oct 16, 1998 | Oct 30, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to October 1998. The gray background is the average SSN index.
