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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 13, 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 | S32 | E21 | 02 | 0000 | ALPHA | Oct 16, 1998 | Oct 23, 1998 | Nov 6, 1998 |
| № 8356 | N20 | W53 | 05 | 0010 | BETA | Oct 10, 1998 | Oct 17, 1998 | Oct 30, 1998 |
| № 8355 | S22 | W02 | 16 | 0150 | BETA | Oct 14, 1998 | Oct 21, 1998 | Nov 3, 1998 |
| № 8354 | S22 | W62 | 01 | 0010 | ALPHA | Oct 9, 1998 | Oct 16, 1998 | Oct 30, 1998 |
| № 8350 | N18 | W67 | 02 | 0070 | ALPHA | Oct 9, 1998 | Oct 16, 1998 | Oct 29, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to October 1998. The gray background is the average SSN index.
