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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 14, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8668 | N21 | E76 | 01 | 0180 | ALPHA | Aug 21, 1999 | Aug 28, 1999 | Sep 10, 1999 |
| № 8667 | N22 | E56 | 02 | 0010 | BETA | Aug 19, 1999 | Aug 26, 1999 | Sep 9, 1999 |
| № 8665 | S26 | E39 | 03 | 0010 | ALPHA | Aug 18, 1999 | Aug 25, 1999 | Sep 8, 1999 |
| № 8662 | S16 | W32 | 25 | 0170 | BETA | Aug 12, 1999 | Aug 19, 1999 | Sep 2, 1999 |
| № 8657 | S30 | W67 | 01 | 0070 | ALPHA | Aug 10, 1999 | Aug 17, 1999 | Aug 31, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to August 1999. The gray background is the average SSN index.
