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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 28, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8321 | N33 | E76 | 01 | 0020 | ALPHA | Sep 4, 1998 | Sep 11, 1998 | Sep 25, 1998 |
| № 8320 | N16 | W57 | 04 | 0010 | BETA | Aug 25, 1998 | Aug 31, 1998 | Sep 14, 1998 |
| № 8319 | N19 | W01 | 22 | 0080 | BETA | Aug 29, 1998 | Sep 5, 1998 | Sep 18, 1998 |
| № 8318 | S21 | W11 | 04 | 0020 | BETA | Aug 28, 1998 | Sep 4, 1998 | Sep 18, 1998 |
| № 8317 | N29 | W76 | 01 | 0000 | ALPHA | Aug 23, 1998 | Aug 30, 1998 | Sep 13, 1998 |
| № 8316 | N25 | E42 | 01 | 0000 | ALPHA | Sep 1, 1998 | Sep 8, 1998 | Sep 22, 1998 |
| № 8314 | N16 | E05 | 04 | 0020 | BETA | Aug 29, 1998 | Sep 5, 1998 | Sep 19, 1998 |
| № 8309 | N17 | W79 | 03 | 0050 | BETA | Aug 23, 1998 | Aug 30, 1998 | Sep 12, 1998 |
| № 8308 | S22 | W44 | 01 | 0080 | ALPHA | Aug 25, 1998 | Sep 1, 1998 | Sep 15, 1998 |
| № 8307 | N31 | W24 | 12 | 0180 | BETA | Aug 27, 1998 | Sep 3, 1998 | Sep 17, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to August 1998. The gray background is the average SSN index.
