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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on June 1, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8563 | S25 | E61 | 03 | 0010 | BETA | Jun 7, 1999 | Jun 14, 1999 | Jun 28, 1999 |
| № 8562 | S15 | E20 | 13 | 0050 | BETA | Jun 4, 1999 | Jun 10, 1999 | Jun 24, 1999 |
| № 8560 | S24 | E20 | 09 | 0030 | BETA | Jun 4, 1999 | Jun 11, 1999 | Jun 25, 1999 |
| № 8559 | N20 | W25 | 01 | 0260 | ALPHA | May 31, 1999 | Jun 7, 1999 | Jun 21, 1999 |
| № 8558 | N16 | E28 | 19 | 0410 | BETA | Jun 4, 1999 | Jun 11, 1999 | Jun 25, 1999 |
| № 8557 | S30 | E19 | 05 | 0030 | ALPHA | Jun 4, 1999 | Jun 11, 1999 | Jun 25, 1999 |
| № 8555 | N17 | E06 | 03 | 0040 | BETA | Jun 3, 1999 | Jun 9, 1999 | Jun 23, 1999 |
| № 8554 | N25 | W37 | 03 | 0010 | BETA | May 30, 1999 | Jun 6, 1999 | Jun 20, 1999 |
| № 8552 | N18 | W34 | 11 | 0150 | BETA | May 31, 1999 | Jun 6, 1999 | Jun 20, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to June 1999. The gray background is the average SSN index.
