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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on June 30, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8612 | S15 | W03 | 06 | 0060 | BETA | Jul 1, 1999 | Jul 7, 1999 | Jul 21, 1999 |
| № 8611 | S25 | E35 | 19 | 0210 | BETA | Jul 4, 1999 | Jul 11, 1999 | Jul 24, 1999 |
| № 8609 | N18 | W17 | 02 | 0010 | BETA | Jun 30, 1999 | Jul 6, 1999 | Jul 20, 1999 |
| № 8606 | N17 | W30 | 11 | 0060 | BETA | Jun 29, 1999 | Jul 5, 1999 | Jul 19, 1999 |
| № 8603 | S15 | E06 | 40 | 0160 | BETA | Jul 1, 1999 | Jul 8, 1999 | Jul 22, 1999 |
| № 8602 | N18 | W05 | 20 | 0260 | BETA | Jun 30, 1999 | Jul 7, 1999 | Jul 21, 1999 |
| № 8599 | S14 | W28 | 08 | 0020 | BETA | Jun 29, 1999 | Jul 6, 1999 | Jul 19, 1999 |
| № 8598 | N23 | W36 | 37 | 0240 | BETA-GAMMA | Jun 28, 1999 | Jul 5, 1999 | Jul 19, 1999 |
| № 8594 | N15 | W36 | 15 | 0050 | BETA | Jun 28, 1999 | Jul 5, 1999 | Jul 19, 1999 |
| № 8592 | N23 | W58 | 01 | 0030 | ALPHA | Jun 26, 1999 | Jul 3, 1999 | Jul 17, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to June 1999. The gray background is the average SSN index.
