Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 13, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8831 | S15 | E80 | 01 | 0020 | ALPHA | Jan 20, 2000 | Jan 27, 2000 | Feb 9, 2000 |
| № 8830 | S09 | E13 | 03 | 0010 | BETA | Jan 15, 2000 | Jan 22, 2000 | Feb 4, 2000 |
| № 8829 | N16 | E68 | 07 | 0170 | BETA | Jan 19, 2000 | Jan 26, 2000 | Feb 9, 2000 |
| № 8828 | S20 | E46 | 05 | 0010 | BETA | Jan 17, 2000 | Jan 24, 2000 | Feb 7, 2000 |
| № 8827 | S12 | W31 | 18 | 0070 | BETA | Jan 12, 2000 | Jan 18, 2000 | Feb 1, 2000 |
| № 8826 | N18 | W33 | 08 | 0080 | BETA | Jan 11, 2000 | Jan 18, 2000 | Feb 1, 2000 |
| № 8825 | N11 | E34 | 02 | 0000 | BETA | Jan 16, 2000 | Jan 23, 2000 | Feb 6, 2000 |
| № 8824 | S13 | E34 | 31 | 0350 | BETA-GAMMA-DELTA | Jan 16, 2000 | Jan 23, 2000 | Feb 6, 2000 |
| № 8823 | S32 | E16 | 08 | 0030 | BETA | Jan 15, 2000 | Jan 22, 2000 | Feb 6, 2000 |
| № 8821 | N28 | E07 | 08 | 0180 | BETA | Jan 14, 2000 | Jan 21, 2000 | Feb 4, 2000 |
| № 8820 | S14 | W06 | 03 | 0010 | BETA | Jan 13, 2000 | Jan 20, 2000 | Feb 3, 2000 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1971 to January 2000. The gray background is the average SSN index.
