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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on July 9, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8627 | S12 | E72 | 01 | 0040 | ALPHA | Jul 15, 1999 | Jul 22, 1999 | Aug 5, 1999 |
| № 8626 | S21 | W28 | 11 | 0080 | BETA | Jul 8, 1999 | Jul 15, 1999 | Jul 28, 1999 |
| № 8625 | S20 | E51 | 01 | 0040 | ALPHA | Jul 14, 1999 | Jul 21, 1999 | Aug 3, 1999 |
| № 8624 | N26 | E02 | 02 | 0000 | ALPHA | Jul 10, 1999 | Jul 17, 1999 | Jul 31, 1999 |
| № 8621 | N20 | E18 | 05 | 0010 | BETA | Jul 11, 1999 | Jul 18, 1999 | Aug 1, 1999 |
| № 8620 | N21 | W08 | 02 | 0100 | ALPHA | Jul 9, 1999 | Jul 16, 1999 | Jul 30, 1999 |
| № 8619 | S18 | E05 | 02 | 0010 | BETA | Jul 10, 1999 | Jul 17, 1999 | Jul 31, 1999 |
| № 8615 | S29 | W14 | 02 | 0180 | ALPHA | Jul 9, 1999 | Jul 16, 1999 | Jul 30, 1999 |
| № 8614 | N18 | W24 | 09 | 0280 | BETA | Jul 8, 1999 | Jul 15, 1999 | Jul 29, 1999 |
| № 8611 | S26 | W82 | 08 | 0190 | BETA | 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.
