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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on June 23, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8600 | N19 | W20 | 02 | 0020 | BETA | Jun 22, 1999 | Jun 29, 1999 | Jul 13, 1999 |
| № 8599 | S16 | E66 | 05 | 0100 | BETA | Jun 29, 1999 | Jul 6, 1999 | Jul 19, 1999 |
| № 8598 | N25 | E58 | 07 | 0110 | BETA | Jun 28, 1999 | Jul 5, 1999 | Jul 19, 1999 |
| № 8597 | N20 | E56 | 02 | 0120 | ALPHA | Jun 28, 1999 | Jul 5, 1999 | Jul 19, 1999 |
| № 8596 | N22 | E42 | 05 | 0040 | BETA | Jun 27, 1999 | Jul 4, 1999 | Jul 18, 1999 |
| № 8595 | N26 | E05 | 03 | 0010 | BETA | Jun 24, 1999 | Jul 1, 1999 | Jul 15, 1999 |
| № 8594 | N14 | E58 | 11 | 0280 | BETA | Jun 28, 1999 | Jul 5, 1999 | Jul 19, 1999 |
| № 8593 | N21 | W87 | 01 | 0000 | ALPHA | Jun 17, 1999 | Jun 24, 1999 | Jul 8, 1999 |
| № 8592 | N24 | E32 | 08 | 0100 | BETA | Jun 26, 1999 | Jul 3, 1999 | Jul 17, 1999 |
| № 8589 | N28 | W75 | 02 | 0080 | BETA | Jun 18, 1999 | Jun 25, 1999 | Jul 9, 1999 |
| № 8585 | N38 | W42 | 04 | 0150 | BETA | Jun 20, 1999 | Jun 28, 1999 | Jul 12, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to June 1999. The gray background is the average SSN index.
