Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 9, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8952 | S23 | E33 | 01 | 0000 | ALPHA | Apr 13, 2000 | Apr 20, 2000 | May 4, 2000 |
| № 8951 | N13 | E61 | 02 | 0120 | BETA | Apr 15, 2000 | Apr 22, 2000 | May 5, 2000 |
| № 8949 | S19 | E40 | 06 | 0200 | BETA | Apr 13, 2000 | Apr 20, 2000 | May 4, 2000 |
| № 8948 | S15 | E11 | 42 | 0210 | BETA-GAMMA-DELTA | Apr 11, 2000 | Apr 18, 2000 | May 2, 2000 |
| № 8945 | S20 | W18 | 02 | 0010 | ALPHA | Apr 9, 2000 | Apr 16, 2000 | Apr 30, 2000 |
| № 8944 | N07 | W24 | 05 | 0030 | BETA | Apr 8, 2000 | Apr 15, 2000 | Apr 29, 2000 |
| № 8943 | N22 | W90 | 01 | 0050 | ALPHA | Apr 3, 2000 | Apr 10, 2000 | Apr 24, 2000 |
| № 8939 | N22 | W56 | 01 | 0070 | ALPHA | Apr 6, 2000 | Apr 13, 2000 | Apr 27, 2000 |
| № 8938 | S10 | W64 | 02 | 0000 | BETA | Apr 5, 2000 | Apr 12, 2000 | Apr 26, 2000 |
| № 8936 | S16 | W64 | 05 | 0070 | BETA | Apr 5, 2000 | Apr 12, 2000 | Apr 26, 2000 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1971 to April 2000. The gray background is the average SSN index.
