Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8836 | S12 | E49 | 02 | 0010 | BETA | Jan 22, 2000 | Jan 29, 2000 | Feb 11, 2000 |
| № 8835 | N09 | E42 | 02 | 0010 | BETA | Jan 21, 2000 | Jan 28, 2000 | Feb 11, 2000 |
| № 8834 | S16 | W73 | 02 | 0030 | BETA | Jan 12, 2000 | Jan 19, 2000 | Feb 2, 2000 |
| № 8833 | N19 | E39 | 01 | 0180 | ALPHA | Jan 21, 2000 | Jan 28, 2000 | Feb 11, 2000 |
| № 8832 | S16 | W39 | 05 | 0010 | BETA | Jan 15, 2000 | Jan 22, 2000 | Feb 5, 2000 |
| № 8831 | S17 | E27 | 23 | 0160 | BETA | Jan 20, 2000 | Jan 27, 2000 | Feb 10, 2000 |
| № 8829 | N16 | E10 | 12 | 0110 | BETA | Jan 19, 2000 | Jan 26, 2000 | Feb 8, 2000 |
| № 8828 | S22 | W09 | 18 | 0100 | BETA | Jan 17, 2000 | Jan 24, 2000 | Feb 7, 2000 |
| № 8827 | S11 | W84 | 06 | 0080 | BETA | Jan 12, 2000 | Jan 18, 2000 | Feb 1, 2000 |
| № 8826 | N18 | W84 | 02 | 0000 | ALPHA | Jan 12, 2000 | Jan 18, 2000 | Feb 1, 2000 |
| № 8825 | N11 | W16 | 02 | 0000 | ALPHA | Jan 17, 2000 | Jan 24, 2000 | Feb 6, 2000 |
| № 8824 | S13 | W17 | 53 | 0380 | BETA-GAMMA | Jan 17, 2000 | Jan 24, 2000 | Feb 6, 2000 |
| № 8821 | N27 | W48 | 04 | 0080 | BETA | Jan 14, 2000 | Jan 21, 2000 | Feb 4, 2000 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1971 to January 2000. The gray background is the average SSN index.
