Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8964 | N34 | E18 | 03 | 0010 | BETA | Apr 20, 2000 | Apr 27, 2000 | May 11, 2000 |
| № 8963 | N16 | E33 | 04 | 0020 | ALPHA | Apr 21, 2000 | Apr 28, 2000 | May 11, 2000 |
| № 8962 | N23 | E33 | 02 | 0070 | BETA | Apr 21, 2000 | Apr 28, 2000 | May 12, 2000 |
| № 8960 | N20 | W60 | 08 | 0050 | BETA | Apr 14, 2000 | Apr 21, 2000 | May 4, 2000 |
| № 8959 | S17 | W28 | 14 | 0040 | BETA | Apr 16, 2000 | Apr 23, 2000 | May 7, 2000 |
| № 8956 | N13 | W34 | 09 | 0010 | BETA | Apr 16, 2000 | Apr 22, 2000 | May 6, 2000 |
| № 8955 | S21 | E04 | 14 | 0350 | BETA-GAMMA | Apr 19, 2000 | Apr 25, 2000 | May 9, 2000 |
| № 8953 | S14 | W23 | 06 | 0020 | BETA | Apr 16, 2000 | Apr 23, 2000 | May 7, 2000 |
| № 8951 | N11 | W47 | 08 | 0110 | BETA | Apr 15, 2000 | Apr 21, 2000 | May 5, 2000 |
| № 8949 | S19 | W68 | 02 | 0070 | 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.
