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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 16, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8306 | N28 | E84 | 02 | 0010 | ALPHA | Aug 23, 1998 | Aug 30, 1998 | Sep 14, 1998 |
| № 8305 | S25 | E12 | 04 | 0010 | BETA | Aug 18, 1998 | Aug 25, 1998 | Sep 8, 1998 |
| № 8304 | S30 | E66 | 01 | 0090 | ALPHA | Aug 22, 1998 | Aug 29, 1998 | Sep 12, 1998 |
| № 8303 | N20 | E40 | 01 | 0000 | ALPHA | Aug 20, 1998 | Aug 27, 1998 | Sep 10, 1998 |
| № 8301 | S21 | W01 | 02 | 0120 | BETA | Aug 17, 1998 | Aug 24, 1998 | Sep 6, 1998 |
| № 8299 | N16 | W24 | 15 | 0490 | BETA-GAMMA-DELTA | Aug 15, 1998 | Aug 22, 1998 | Sep 5, 1998 |
| № 8297 | N31 | W38 | 11 | 0350 | BETA | Aug 14, 1998 | Aug 21, 1998 | Sep 4, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to August 1998. The gray background is the average SSN index.
