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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8530 | N16 | E51 | 02 | 0000 | BETA | May 8, 1999 | May 15, 1999 | May 29, 1999 |
| № 8529 | S13 | E08 | 04 | 0000 | BETA | May 5, 1999 | May 12, 1999 | May 25, 1999 |
| № 8528 | S15 | E49 | 03 | 0010 | BETA | May 8, 1999 | May 15, 1999 | May 28, 1999 |
| № 8527 | N27 | E36 | 03 | 0020 | ALPHA | May 7, 1999 | May 14, 1999 | May 28, 1999 |
| № 8526 | N23 | W05 | 05 | 0010 | BETA | May 4, 1999 | May 11, 1999 | May 25, 1999 |
| № 8525 | N17 | E32 | 16 | 0290 | BETA | May 7, 1999 | May 13, 1999 | May 27, 1999 |
| № 8524 | N21 | W57 | 19 | 0150 | BETA-GAMMA | Apr 30, 1999 | May 7, 1999 | May 20, 1999 |
| № 8523 | N30 | W57 | 04 | 0020 | BETA | Apr 30, 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.
