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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on July 1, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8613 | N18 | E66 | 05 | 0040 | BETA | Jul 7, 1999 | Jul 14, 1999 | Jul 28, 1999 |
| № 8612 | S15 | W19 | 05 | 0050 | BETA | Jul 1, 1999 | Jul 7, 1999 | Jul 21, 1999 |
| № 8611 | S25 | E21 | 30 | 0250 | BETA-GAMMA | Jul 4, 1999 | Jul 11, 1999 | Jul 25, 1999 |
| № 8610 | N12 | W25 | 06 | 0010 | BETA | Jun 30, 1999 | Jul 7, 1999 | Jul 21, 1999 |
| № 8606 | N17 | W46 | 05 | 0050 | BETA | Jun 29, 1999 | Jul 5, 1999 | Jul 19, 1999 |
| № 8603 | S14 | W11 | 36 | 0110 | BETA-GAMMA | Jul 1, 1999 | Jul 8, 1999 | Jul 22, 1999 |
| № 8602 | N18 | W21 | 15 | 0210 | BETA | Jun 30, 1999 | Jul 7, 1999 | Jul 21, 1999 |
| № 8599 | S15 | W43 | 05 | 0020 | BETA | Jun 29, 1999 | Jul 6, 1999 | Jul 19, 1999 |
| № 8598 | N23 | W50 | 14 | 0140 | BETA | Jun 28, 1999 | Jul 5, 1999 | Jul 19, 1999 |
| № 8594 | N14 | W51 | 05 | 0030 | ALPHA | Jun 28, 1999 | Jul 5, 1999 | Jul 19, 1999 |
| № 8592 | N23 | W74 | 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 July 1999. The gray background is the average SSN index.
