Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 18, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8965 | S16 | E63 | 02 | 0010 | BETA | Apr 24, 2000 | May 1, 2000 | May 15, 2000 |
| № 8964 | N34 | E05 | 06 | 0030 | BETA | Apr 20, 2000 | Apr 27, 2000 | May 11, 2000 |
| № 8963 | N16 | E19 | 07 | 0040 | BETA | Apr 21, 2000 | Apr 28, 2000 | May 11, 2000 |
| № 8962 | N24 | E21 | 01 | 0060 | ALPHA | Apr 21, 2000 | Apr 28, 2000 | May 12, 2000 |
| № 8961 | S27 | W50 | 02 | 0010 | ALPHA | Apr 15, 2000 | Apr 22, 2000 | May 6, 2000 |
| № 8960 | N19 | W77 | 01 | 0020 | ALPHA | Apr 13, 2000 | Apr 20, 2000 | May 4, 2000 |
| № 8959 | S17 | W37 | 06 | 0020 | BETA | Apr 16, 2000 | Apr 23, 2000 | May 7, 2000 |
| № 8958 | N18 | W15 | 01 | 0000 | ALPHA | Apr 18, 2000 | Apr 25, 2000 | May 9, 2000 |
| № 8955 | S22 | W09 | 13 | 0320 | BETA-GAMMA | Apr 19, 2000 | Apr 25, 2000 | May 9, 2000 |
| № 8953 | S13 | W37 | 01 | 0010 | ALPHA | Apr 16, 2000 | Apr 23, 2000 | May 7, 2000 |
| № 8951 | N12 | W60 | 04 | 0080 | BETA | Apr 15, 2000 | Apr 21, 2000 | May 5, 2000 |
| № 8949 | S20 | W82 | 02 | 0080 | ALPHA | Apr 13, 2000 | Apr 20, 2000 | May 4, 2000 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1971 to April 2000. The gray background is the average SSN index.
