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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on June 12, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8583 | S12 | E70 | 02 | 0080 | ALPHA | Jun 18, 1999 | Jun 25, 1999 | Jul 9, 1999 |
| № 8582 | N26 | E33 | 07 | 0010 | BETA | Jun 15, 1999 | Jun 22, 1999 | Jul 6, 1999 |
| № 8580 | S20 | E44 | 02 | 0300 | ALPHA | Jun 16, 1999 | Jun 23, 1999 | Jul 7, 1999 |
| № 8579 | N10 | W17 | 01 | 0000 | ALPHA | Jun 12, 1999 | Jun 18, 1999 | Jul 2, 1999 |
| № 8578 | N19 | W35 | 08 | 0130 | BETA | Jun 10, 1999 | Jun 17, 1999 | Jul 1, 1999 |
| № 8577 | N19 | W75 | 02 | 0000 | ALPHA | Jun 7, 1999 | Jun 14, 1999 | Jun 28, 1999 |
| № 8576 | S29 | W16 | 03 | 0010 | BETA | Jun 12, 1999 | Jun 19, 1999 | Jul 3, 1999 |
| № 8575 | N13 | W29 | 05 | 0010 | BETA | Jun 11, 1999 | Jun 17, 1999 | Jul 1, 1999 |
| № 8574 | N29 | W35 | 18 | 0160 | BETA-GAMMA | Jun 10, 1999 | Jun 17, 1999 | Jul 1, 1999 |
| № 8571 | S19 | W15 | 03 | 0040 | BETA | Jun 12, 1999 | Jun 19, 1999 | Jul 2, 1999 |
| № 8570 | S13 | W16 | 02 | 0030 | ALPHA | Jun 12, 1999 | Jun 18, 1999 | Jul 2, 1999 |
| № 8569 | N19 | W18 | 38 | 0260 | BETA-GAMMA | Jun 11, 1999 | Jun 18, 1999 | Jul 2, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to June 1999. The gray background is the average SSN index.
