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) | |
|---|---|---|---|---|---|---|---|---|
| № 9430 | S16 | W33 | 05 | 0030 | Beta | Apr 15, 2001 | Apr 22, 2001 | May 6, 2001 |
| № 9429 | N09 | E36 | 01 | 0090 | Alpha | Apr 21, 2001 | Apr 28, 2001 | May 11, 2001 |
| № 9427 | S06 | W79 | 02 | 0020 | Alpha | Apr 12, 2001 | Apr 19, 2001 | May 2, 2001 |
| № 9426 | S08 | W27 | 05 | 0020 | Beta | Apr 16, 2001 | Apr 23, 2001 | May 6, 2001 |
| № 9424 | S16 | W72 | 04 | 0020 | Beta | Apr 13, 2001 | Apr 19, 2001 | May 3, 2001 |
| № 9422 | S12 | W43 | 04 | 0010 | Beta | Apr 15, 2001 | Apr 22, 2001 | May 5, 2001 |
| № 9420 | S06 | W71 | 01 | 0020 | Alpha | Apr 13, 2001 | Apr 19, 2001 | May 3, 2001 |
| № 9418 | N27 | W84 | 05 | 0120 | Beta | Apr 11, 2001 | Apr 18, 2001 | May 2, 2001 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1972, January to 2001, April. Gray background - average solar cycle.
