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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 27, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8555 | N16 | E77 | 01 | 0050 | ALPHA | Jun 3, 1999 | Jun 10, 1999 | Jun 23, 1999 |
| № 8554 | N26 | E28 | 12 | 0030 | BETA | May 30, 1999 | Jun 6, 1999 | Jun 20, 1999 |
| № 8553 | N29 | W06 | 08 | 0010 | BETA | May 27, 1999 | Jun 3, 1999 | Jun 18, 1999 |
| № 8552 | N11 | E43 | 06 | 0330 | BETA | May 31, 1999 | Jun 7, 1999 | Jun 20, 1999 |
| № 8551 | N31 | W00 | 05 | 0050 | BETA | May 28, 1999 | Jun 4, 1999 | Jun 18, 1999 |
| № 8550 | S14 | W10 | 17 | 0120 | BETA | May 27, 1999 | Jun 3, 1999 | Jun 17, 1999 |
| № 8548 | S21 | W69 | 07 | 0080 | BETA | May 23, 1999 | May 29, 1999 | Jun 12, 1999 |
| № 8545 | N37 | W68 | 05 | 0260 | BETA | May 22, 1999 | May 30, 1999 | Jun 13, 1999 |
| № 8544 | S22 | W91 | 01 | 0060 | ALPHA | May 21, 1999 | May 28, 1999 | Jun 11, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to May 1999. The gray background is the average SSN index.
