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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 2, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8656 | N18 | E35 | 04 | 0010 | BETA | Aug 6, 1999 | Aug 12, 1999 | Aug 26, 1999 |
| № 8655 | N25 | E39 | 01 | 0010 | ALPHA | Aug 6, 1999 | Aug 13, 1999 | Aug 27, 1999 |
| № 8654 | N19 | W30 | 06 | 0030 | BETA | Aug 1, 1999 | Aug 8, 1999 | Aug 21, 1999 |
| № 8653 | N28 | W83 | 04 | 0020 | BETA | Jul 27, 1999 | Aug 3, 1999 | Aug 18, 1999 |
| № 8651 | N24 | E10 | 58 | 0870 | BETA-GAMMA | Aug 4, 1999 | Aug 11, 1999 | Aug 25, 1999 |
| № 8650 | N18 | E11 | 12 | 0050 | BETA | Aug 4, 1999 | Aug 11, 1999 | Aug 24, 1999 |
| № 8649 | S15 | W53 | 08 | 0050 | BETA | Jul 30, 1999 | Aug 6, 1999 | Aug 19, 1999 |
| № 8648 | N24 | W11 | 05 | 0010 | BETA | Aug 2, 1999 | Aug 9, 1999 | Aug 23, 1999 |
| № 8647 | S18 | W33 | 15 | 0040 | BETA | Jul 31, 1999 | Aug 7, 1999 | Aug 21, 1999 |
| № 8645 | S25 | W28 | 43 | 0540 | BETA-GAMMA | Aug 1, 1999 | Aug 8, 1999 | Aug 22, 1999 |
| № 8640 | N18 | W81 | 01 | 0060 | 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.
