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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8528 | S15 | E61 | 01 | 0000 | ALPHA | May 8, 1999 | May 15, 1999 | May 28, 1999 |
| № 8527 | N26 | E51 | 01 | 0020 | ALPHA | May 7, 1999 | May 14, 1999 | May 28, 1999 |
| № 8525 | N17 | E47 | 12 | 0280 | BETA | May 7, 1999 | May 14, 1999 | May 27, 1999 |
| № 8524 | N22 | W42 | 27 | 0170 | BETA-GAMMA | Apr 30, 1999 | May 7, 1999 | May 21, 1999 |
| № 8523 | N32 | W47 | 01 | 0000 | ALPHA | Apr 29, 1999 | May 7, 1999 | May 21, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to May 1999. The gray background is the average SSN index.
