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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 22, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8551 | N32 | E62 | 02 | 0060 | BETA | May 28, 1999 | Jun 4, 1999 | Jun 18, 1999 |
| № 8550 | S14 | E55 | 08 | 0220 | BETA | May 27, 1999 | Jun 3, 1999 | Jun 17, 1999 |
| № 8549 | N26 | W79 | 07 | 0230 | BETA | May 17, 1999 | May 24, 1999 | Jun 7, 1999 |
| № 8548 | S20 | W06 | 14 | 0100 | BETA | May 23, 1999 | May 29, 1999 | Jun 12, 1999 |
| № 8545 | N36 | W10 | 06 | 0350 | BETA | May 22, 1999 | May 29, 1999 | Jun 13, 1999 |
| № 8544 | S19 | W35 | 20 | 0170 | BETA | May 20, 1999 | May 27, 1999 | Jun 10, 1999 |
| № 8542 | S18 | W59 | 01 | 0030 | ALPHA | May 19, 1999 | May 25, 1999 | Jun 8, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to May 1999. The gray background is the average SSN index.
