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 | S25 | W39 | 04 | 0030 | Beta | Apr 9, 2001 | Apr 16, 2001 | Apr 30, 2001 |
| № 9424 | S17 | E08 | 02 | 0020 | Alpha | Apr 13, 2001 | Apr 19, 2001 | May 3, 2001 |
| № 9423 | N19 | W24 | 02 | 0010 | Alpha | Apr 10, 2001 | Apr 17, 2001 | May 1, 2001 |
| № 9422 | S13 | E37 | 02 | 0050 | Alpha | Apr 15, 2001 | Apr 22, 2001 | May 5, 2001 |
| № 9420 | S07 | E10 | 03 | 0050 | Beta | Apr 13, 2001 | Apr 20, 2001 | May 3, 2001 |
| № 9419 | N08 | W88 | 01 | 0000 | Alpha | Apr 5, 2001 | Apr 12, 2001 | Apr 26, 2001 |
| № 9418 | N26 | W07 | 13 | 0190 | Beta | Apr 11, 2001 | Apr 18, 2001 | May 2, 2001 |
| № 9417 | S08 | W39 | 13 | 0090 | Beta | Apr 9, 2001 | Apr 16, 2001 | Apr 29, 2001 |
| № 9415 | S23 | W19 | 40 | 0490 | Beta-Gamma-Delta | Apr 11, 2001 | Apr 17, 2001 | May 1, 2001 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1972, January to 2001, April. Gray background - average solar cycle.
