Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8959 | S19 | E29 | 10 | 0070 | BETA | Apr 16, 2000 | Apr 23, 2000 | May 7, 2000 |
| № 8958 | N17 | E53 | 05 | 0020 | BETA | Apr 18, 2000 | Apr 25, 2000 | May 9, 2000 |
| № 8956 | N14 | E24 | 05 | 0020 | BETA | Apr 16, 2000 | Apr 23, 2000 | May 6, 2000 |
| № 8955 | S22 | E57 | 09 | 0260 | BETA | Apr 18, 2000 | Apr 25, 2000 | May 9, 2000 |
| № 8954 | N31 | E40 | 07 | 0030 | BETA | Apr 17, 2000 | Apr 24, 2000 | May 8, 2000 |
| № 8953 | S16 | E31 | 16 | 0080 | BETA | Apr 16, 2000 | Apr 23, 2000 | May 7, 2000 |
| № 8951 | N11 | E11 | 03 | 0090 | BETA | Apr 15, 2000 | Apr 22, 2000 | May 5, 2000 |
| № 8949 | S19 | W14 | 06 | 0110 | BETA | Apr 13, 2000 | Apr 20, 2000 | May 4, 2000 |
| № 8948 | S16 | W37 | 21 | 0140 | BETA-GAMMA | Apr 11, 2000 | Apr 18, 2000 | May 2, 2000 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1971 to April 2000. The gray background is the average SSN index.
