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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on July 7, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8625 | S20 | E76 | 01 | 0020 | ALPHA | Jul 14, 1999 | Jul 21, 1999 | Aug 3, 1999 |
| № 8624 | N24 | E26 | 02 | 0000 | ALPHA | Jul 10, 1999 | Jul 17, 1999 | Jul 31, 1999 |
| № 8623 | N26 | W11 | 01 | 0000 | ALPHA | Jul 7, 1999 | Jul 14, 1999 | Jul 28, 1999 |
| № 8622 | S31 | W20 | 03 | 0020 | BETA | Jul 6, 1999 | Jul 14, 1999 | Jul 28, 1999 |
| № 8621 | N20 | E44 | 03 | 0020 | BETA | Jul 11, 1999 | Jul 18, 1999 | Aug 1, 1999 |
| № 8620 | N20 | E16 | 04 | 0090 | BETA | Jul 9, 1999 | Jul 16, 1999 | Jul 30, 1999 |
| № 8619 | S17 | E30 | 03 | 0020 | ALPHA | Jul 10, 1999 | Jul 17, 1999 | Jul 31, 1999 |
| № 8617 | N13 | W82 | 05 | 0100 | BETA | Jul 2, 1999 | Jul 9, 1999 | Jul 22, 1999 |
| № 8615 | S29 | E11 | 01 | 0200 | ALPHA | Jul 9, 1999 | Jul 16, 1999 | Jul 30, 1999 |
| № 8614 | N18 | E01 | 22 | 0470 | BETA | Jul 8, 1999 | Jul 15, 1999 | Jul 29, 1999 |
| № 8613 | N19 | W08 | 03 | 0010 | BETA | Jul 7, 1999 | Jul 14, 1999 | Jul 28, 1999 |
| № 8611 | S26 | W59 | 22 | 0350 | BETA-GAMMA | Jul 3, 1999 | Jul 10, 1999 | Jul 24, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to July 1999. The gray background is the average SSN index.
