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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on July 6, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8621 | N20 | E56 | 05 | 0040 | BETA | Jul 11, 1999 | Jul 18, 1999 | Aug 1, 1999 |
| № 8620 | N20 | E31 | 04 | 0090 | BETA | Jul 9, 1999 | Jul 16, 1999 | Jul 30, 1999 |
| № 8619 | S18 | E46 | 02 | 0040 | ALPHA | Jul 10, 1999 | Jul 17, 1999 | Jul 31, 1999 |
| № 8617 | N12 | W67 | 06 | 0150 | BETA | Jul 2, 1999 | Jul 9, 1999 | Jul 22, 1999 |
| № 8615 | S29 | E27 | 02 | 0190 | ALPHA | Jul 9, 1999 | Jul 16, 1999 | Jul 30, 1999 |
| № 8614 | N18 | E16 | 28 | 0200 | BETA | Jul 8, 1999 | Jul 15, 1999 | Jul 29, 1999 |
| № 8613 | N18 | E06 | 03 | 0010 | BETA | Jul 7, 1999 | Jul 14, 1999 | Jul 28, 1999 |
| № 8611 | S26 | W43 | 29 | 0380 | BETA-GAMMA | Jul 4, 1999 | Jul 10, 1999 | Jul 24, 1999 |
| № 8603 | S16 | W78 | 07 | 0140 | BETA | Jul 1, 1999 | Jul 8, 1999 | Jul 21, 1999 |
| № 8602 | N17 | W86 | 02 | 0070 | ALPHA | Jun 30, 1999 | Jul 7, 1999 | Jul 21, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to July 1999. The gray background is the average SSN index.
