Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 4, 2000. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9155 | S11 | E32 | 05 | 0020 | BETA | Sep 7, 2000 | Sep 14, 2000 | Sep 28, 2000 |
| № 9154 | S21 | E18 | 09 | 0020 | BETA | Sep 6, 2000 | Sep 13, 2000 | Sep 27, 2000 |
| № 9153 | S33 | W11 | 06 | 0020 | BETA | Sep 4, 2000 | Sep 11, 2000 | Sep 26, 2000 |
| № 9152 | N18 | E34 | 02 | 0040 | ALPHA | Sep 8, 2000 | Sep 14, 2000 | Sep 28, 2000 |
| № 9151 | N09 | E06 | 04 | 0010 | BETA | Sep 5, 2000 | Sep 12, 2000 | Sep 26, 2000 |
| № 9149 | N14 | W10 | 28 | 0240 | BETA | Sep 4, 2000 | Sep 11, 2000 | Sep 25, 2000 |
| № 9147 | N07 | W12 | 08 | 0100 | BETA | Sep 4, 2000 | Sep 11, 2000 | Sep 24, 2000 |
| № 9146 | S23 | W45 | 01 | 0010 | ALPHA | Sep 2, 2000 | Sep 8, 2000 | Sep 22, 2000 |
| № 9145 | S09 | W35 | 04 | 0070 | ALPHA | Sep 2, 2000 | Sep 9, 2000 | Sep 23, 2000 |
| № 9143 | S19 | W62 | 02 | 0020 | BETA | Aug 31, 2000 | Sep 7, 2000 | Sep 21, 2000 |
| № 9142 | N16 | W63 | 02 | 0020 | BETA | Aug 31, 2000 | Sep 7, 2000 | Sep 21, 2000 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1971 to September 2000. The gray background is the average SSN index.
