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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 6, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8534 | S18 | E72 | 01 | 0030 | ALPHA | May 13, 1999 | May 20, 1999 | Jun 2, 1999 |
| № 8533 | N05 | E72 | 03 | 0050 | BETA | May 13, 1999 | May 19, 1999 | Jun 2, 1999 |
| № 8532 | S40 | W16 | 02 | 0010 | BETA | May 6, 1999 | May 13, 1999 | May 28, 1999 |
| № 8531 | N18 | E50 | 05 | 0030 | BETA | May 11, 1999 | May 18, 1999 | Jun 1, 1999 |
| № 8530 | N16 | E12 | 02 | 0010 | BETA | May 8, 1999 | May 15, 1999 | May 29, 1999 |
| № 8529 | S14 | W32 | 04 | 0010 | BETA | May 5, 1999 | May 12, 1999 | May 25, 1999 |
| № 8528 | S16 | E12 | 04 | 0020 | BETA | May 8, 1999 | May 15, 1999 | May 29, 1999 |
| № 8527 | N26 | W02 | 01 | 0000 | ALPHA | May 7, 1999 | May 14, 1999 | May 28, 1999 |
| № 8526 | N20 | W46 | 08 | 0050 | BETA | May 4, 1999 | May 11, 1999 | May 24, 1999 |
| № 8525 | N18 | W04 | 15 | 0170 | BETA | May 7, 1999 | May 14, 1999 | May 27, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to May 1999. The gray background is the average SSN index.
