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) | |
|---|---|---|---|---|---|---|---|---|
| № 9424 | S16 | E34 | 05 | 0000 | Beta | Apr 13, 2001 | Apr 19, 2001 | May 3, 2001 |
| № 9423 | N21 | E03 | 03 | 0000 | Beta | Apr 10, 2001 | Apr 17, 2001 | May 1, 2001 |
| № 9422 | S12 | E64 | 01 | 0050 | Alpha | Apr 15, 2001 | Apr 22, 2001 | May 5, 2001 |
| № 9421 | S16 | W57 | 01 | 0020 | Alpha | Apr 6, 2001 | Apr 13, 2001 | Apr 26, 2001 |
| № 9420 | S06 | E36 | 01 | 0080 | Alpha | Apr 13, 2001 | Apr 19, 2001 | May 3, 2001 |
| № 9418 | N27 | E19 | 19 | 0230 | Beta | Apr 11, 2001 | Apr 18, 2001 | May 3, 2001 |
| № 9417 | S09 | W12 | 21 | 0140 | Beta | Apr 9, 2001 | Apr 16, 2001 | Apr 29, 2001 |
| № 9415 | S21 | E05 | 34 | 0790 | Beta-Gamma-Delta | Apr 10, 2001 | Apr 17, 2001 | May 1, 2001 |
| № 9407 | N11 | W81 | 01 | 0070 | Alpha | Apr 4, 2001 | Apr 11, 2001 | Apr 24, 2001 |
| № 9406 | N27 | W73 | 02 | 0120 | 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.
