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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 23, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8367 | N17 | W14 | 12 | 0090 | BETA | Oct 23, 1998 | Oct 30, 1998 | Nov 12, 1998 |
| № 8365 | S27 | W47 | 14 | 0320 | BETA-GAMMA | Oct 20, 1998 | Oct 27, 1998 | Nov 10, 1998 |
| № 8363 | N25 | W49 | 04 | 0010 | BETA | Oct 20, 1998 | Oct 27, 1998 | Nov 10, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to October 1998. The gray background is the average SSN index.
