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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 21, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8311 | N19 | E03 | 01 | 0000 | ALPHA | Aug 22, 1998 | Aug 29, 1998 | Sep 12, 1998 |
| № 8310 | N23 | E68 | 01 | 0010 | ALPHA | Aug 27, 1998 | Sep 3, 1998 | Sep 17, 1998 |
| № 8309 | N17 | E17 | 09 | 0030 | BETA | Aug 23, 1998 | Aug 30, 1998 | Sep 13, 1998 |
| № 8308 | S21 | E47 | 02 | 0100 | ALPHA | Aug 25, 1998 | Sep 1, 1998 | Sep 15, 1998 |
| № 8307 | N32 | E61 | 08 | 0440 | BETA-DELTA | Aug 27, 1998 | Sep 3, 1998 | Sep 17, 1998 |
| № 8306 | N28 | E19 | 02 | 0030 | ALPHA | Aug 23, 1998 | Aug 30, 1998 | Sep 13, 1998 |
| № 8304 | S27 | E05 | 05 | 0070 | BETA | Aug 22, 1998 | Aug 29, 1998 | Sep 12, 1998 |
| № 8301 | S22 | W71 | 01 | 0070 | ALPHA | Aug 16, 1998 | Aug 23, 1998 | Sep 6, 1998 |
| № 8299 | N15 | W88 | 01 | 0080 | ALPHA | Aug 15, 1998 | Aug 22, 1998 | Sep 5, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to August 1998. The gray background is the average SSN index.
