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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on June 4, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8567 | S14 | W04 | 04 | 0010 | BETA | Jun 5, 1999 | Jun 12, 1999 | Jun 25, 1999 |
| № 8566 | N23 | E63 | 01 | 0020 | ALPHA | Jun 10, 1999 | Jun 17, 1999 | Jul 1, 1999 |
| № 8564 | S14 | E40 | 01 | 0030 | ALPHA | Jun 8, 1999 | Jun 15, 1999 | Jun 28, 1999 |
| № 8563 | S25 | E25 | 03 | 0010 | BETA | Jun 7, 1999 | Jun 14, 1999 | Jun 28, 1999 |
| № 8562 | S15 | W18 | 29 | 0420 | BETA-GAMMA | Jun 4, 1999 | Jun 10, 1999 | Jun 24, 1999 |
| № 8559 | N21 | W63 | 01 | 0250 | ALPHA | May 31, 1999 | Jun 7, 1999 | Jun 21, 1999 |
| № 8558 | N16 | W09 | 23 | 0600 | BETA | Jun 4, 1999 | Jun 11, 1999 | Jun 25, 1999 |
| № 8555 | N16 | W30 | 01 | 0030 | ALPHA | Jun 3, 1999 | Jun 10, 1999 | Jun 23, 1999 |
| № 8554 | N24 | W78 | 08 | 0130 | BETA | May 30, 1999 | Jun 6, 1999 | Jun 20, 1999 |
| № 8552 | N20 | W72 | 05 | 0290 | BETA | May 30, 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.
