No image for the selected date
Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 3, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8657 | S32 | E71 | 01 | 0040 | ALPHA | Aug 10, 1999 | Aug 17, 1999 | Aug 31, 1999 |
| № 8656 | N17 | E20 | 08 | 0020 | BETA | Aug 6, 1999 | Aug 12, 1999 | Aug 26, 1999 |
| № 8655 | N25 | E23 | 01 | 0000 | ALPHA | Aug 6, 1999 | Aug 13, 1999 | Aug 27, 1999 |
| № 8654 | N20 | W46 | 04 | 0010 | BETA | Jul 31, 1999 | Aug 7, 1999 | Aug 21, 1999 |
| № 8651 | N25 | W04 | 43 | 1370 | BETA-GAMMA | Aug 4, 1999 | Aug 11, 1999 | Aug 25, 1999 |
| № 8650 | N18 | W04 | 06 | 0040 | BETA | Aug 4, 1999 | Aug 11, 1999 | Aug 24, 1999 |
| № 8649 | S15 | W66 | 02 | 0010 | ALPHA | Jul 30, 1999 | Aug 6, 1999 | Aug 19, 1999 |
| № 8647 | S18 | W49 | 17 | 0140 | BETA | Jul 31, 1999 | Aug 7, 1999 | Aug 21, 1999 |
| № 8645 | S25 | W44 | 27 | 0490 | BETA-GAMMA | Aug 1, 1999 | Aug 8, 1999 | Aug 22, 1999 |
| № 8640 | N17 | W94 | 01 | 0010 | ALPHA | Jul 28, 1999 | Aug 4, 1999 | Aug 17, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to August 1999. The gray background is the average SSN index.
