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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 26, 1999. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8678 | N16 | W39 | 01 | 0000 | ALPHA | Aug 24, 1999 | Aug 31, 1999 | Sep 13, 1999 |
| № 8677 | N07 | E72 | 01 | 0060 | ALPHA | Sep 1, 1999 | Sep 8, 1999 | Sep 22, 1999 |
| № 8676 | N26 | E62 | 04 | 0010 | BETA | Sep 1, 1999 | Sep 8, 1999 | Sep 22, 1999 |
| № 8675 | N18 | E67 | 02 | 0040 | ALPHA | Sep 1, 1999 | Sep 8, 1999 | Sep 22, 1999 |
| № 8674 | S24 | E12 | 23 | 0340 | BETA-GAMMA | Aug 28, 1999 | Sep 4, 1999 | Sep 18, 1999 |
| № 8673 | S21 | E09 | 18 | 0410 | BETA | Aug 28, 1999 | Sep 4, 1999 | Sep 17, 1999 |
| № 8668 | N23 | W74 | 08 | 0120 | BETA | Aug 21, 1999 | Aug 28, 1999 | Sep 11, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to August 1999. The gray background is the average SSN index.
