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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 5, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8660 | S34 | W25 | 03 | 0010 | BETA | Aug 4, 1999 | Aug 11, 1999 | Aug 26, 1999 |
| № 8659 | S22 | E07 | 01 | 0000 | ALPHA | Aug 7, 1999 | Aug 13, 1999 | Aug 27, 1999 |
| № 8657 | S30 | E43 | 06 | 0140 | BETA | Aug 9, 1999 | Aug 16, 1999 | Aug 31, 1999 |
| № 8656 | N19 | W08 | 15 | 0130 | BETA | Aug 5, 1999 | Aug 12, 1999 | Aug 26, 1999 |
| № 8651 | N25 | W31 | 41 | 0950 | BETA-GAMMA | Aug 4, 1999 | Aug 11, 1999 | Aug 25, 1999 |
| № 8650 | N18 | W30 | 01 | 0030 | ALPHA | Aug 4, 1999 | Aug 11, 1999 | Aug 24, 1999 |
| № 8647 | S19 | W76 | 12 | 0350 | BETA | Jul 31, 1999 | Aug 7, 1999 | Aug 21, 1999 |
| № 8645 | S26 | W66 | 18 | 0360 | BETA | Aug 1, 1999 | Aug 8, 1999 | Aug 22, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to August 1999. The gray background is the average SSN index.
