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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on July 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8632 | S19 | W56 | 03 | 0030 | BETA | Jul 9, 1999 | Jul 15, 1999 | Jul 29, 1999 |
| № 8631 | N11 | E79 | 01 | 0080 | ALPHA | Jul 19, 1999 | Jul 26, 1999 | Aug 8, 1999 |
| № 8630 | S09 | W80 | 05 | 0010 | BETA | Jul 7, 1999 | Jul 14, 1999 | Jul 27, 1999 |
| № 8628 | N18 | E22 | 20 | 0170 | BETA | Jul 15, 1999 | Jul 21, 1999 | Aug 4, 1999 |
| № 8627 | S14 | E35 | 15 | 0210 | BETA | Jul 16, 1999 | Jul 22, 1999 | Aug 5, 1999 |
| № 8626 | S20 | W69 | 09 | 0160 | BETA | Jul 8, 1999 | Jul 14, 1999 | Jul 28, 1999 |
| № 8625 | S20 | E12 | 02 | 0020 | ALPHA | Jul 14, 1999 | Jul 21, 1999 | Aug 3, 1999 |
| № 8624 | N24 | W39 | 03 | 0010 | BETA | Jul 10, 1999 | Jul 17, 1999 | Jul 31, 1999 |
| № 8621 | N21 | W18 | 04 | 0000 | ALPHA | Jul 11, 1999 | Jul 18, 1999 | Aug 1, 1999 |
| № 8620 | N22 | W46 | 04 | 0060 | BETA | Jul 9, 1999 | Jul 16, 1999 | Jul 30, 1999 |
| № 8615 | S29 | W53 | 09 | 0190 | BETA | Jul 9, 1999 | Jul 16, 1999 | Jul 30, 1999 |
| № 8614 | N18 | W64 | 07 | 0170 | BETA | Jul 8, 1999 | Jul 15, 1999 | Jul 29, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to July 1999. The gray background is the average SSN index.
