Active areas
Sunspots and active regions
By the end of the day, the following active regions with sunspots could be observed on the Sun's surface
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 9425 | S24 | W26 | 04 | 0020 | Beta | Apr 9, 2001 | Apr 16, 2001 | Apr 30, 2001 |
| № 9424 | S16 | E22 | 02 | 0020 | Beta | Apr 13, 2001 | Apr 20, 2001 | May 3, 2001 |
| № 9423 | N20 | W10 | 04 | 0010 | Beta | Apr 10, 2001 | Apr 17, 2001 | May 1, 2001 |
| № 9422 | S12 | E51 | 02 | 0070 | Alpha | Apr 15, 2001 | Apr 22, 2001 | May 5, 2001 |
| № 9421 | S16 | W72 | 01 | 0030 | Alpha | Apr 6, 2001 | Apr 12, 2001 | Apr 26, 2001 |
| № 9420 | S07 | E22 | 01 | 0040 | Alpha | Apr 13, 2001 | Apr 19, 2001 | May 3, 2001 |
| № 9418 | N27 | E07 | 17 | 0210 | Beta | Apr 12, 2001 | Apr 19, 2001 | May 3, 2001 |
| № 9417 | S08 | W27 | 10 | 0120 | Beta | Apr 9, 2001 | Apr 16, 2001 | Apr 29, 2001 |
| № 9415 | S22 | W07 | 32 | 0760 | Beta-Gamma-Delta | Apr 10, 2001 | Apr 17, 2001 | May 1, 2001 |
| № 9407 | N11 | W94 | 01 | 0060 | Alpha | Apr 4, 2001 | Apr 11, 2001 | Apr 24, 2001 |
| № 9406 | N27 | W86 | 01 | 0080 | Alpha | Apr 4, 2001 | Apr 11, 2001 | Apr 25, 2001 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1972, January to 2001, April. Gray background - average solar cycle.
