No image for the selected date
Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 8, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8663 | N19 | E17 | 04 | 0020 | BETA | Aug 10, 1999 | Aug 17, 1999 | Aug 31, 1999 |
| № 8662 | S16 | E51 | 10 | 0100 | BETA | Aug 13, 1999 | Aug 20, 1999 | Sep 2, 1999 |
| № 8661 | S14 | W25 | 04 | 0010 | BETA | Aug 7, 1999 | Aug 14, 1999 | Aug 27, 1999 |
| № 8657 | S30 | E05 | 11 | 0130 | BETA | Aug 9, 1999 | Aug 16, 1999 | Aug 31, 1999 |
| № 8656 | N18 | W45 | 11 | 0030 | BETA | Aug 5, 1999 | Aug 12, 1999 | Aug 26, 1999 |
| № 8655 | N22 | W35 | 03 | 0010 | ALPHA | Aug 6, 1999 | Aug 13, 1999 | Aug 27, 1999 |
| № 8651 | N26 | W69 | 25 | 0600 | BETA | Aug 4, 1999 | Aug 11, 1999 | Aug 25, 1999 |
| № 8650 | N17 | W68 | 01 | 0030 | ALPHA | Aug 4, 1999 | Aug 11, 1999 | Aug 24, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to August 1999. The gray background is the average SSN index.
