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) | |
|---|---|---|---|---|---|---|---|---|
| № 9420 | S06 | E62 | 02 | 0070 | Alpha | Apr 13, 2001 | Apr 19, 2001 | May 3, 2001 |
| № 9418 | N27 | E45 | 08 | 0200 | Beta | Apr 12, 2001 | Apr 19, 2001 | May 3, 2001 |
| № 9417 | S08 | E14 | 13 | 0180 | Beta | Apr 9, 2001 | Apr 16, 2001 | Apr 29, 2001 |
| № 9415 | S21 | E33 | 11 | 0860 | Beta-Gamma | Apr 11, 2001 | Apr 17, 2001 | May 1, 2001 |
| № 9413 | N10 | W86 | 01 | 0100 | Alpha | Apr 2, 2001 | Apr 8, 2001 | Apr 22, 2001 |
| № 9412 | S16 | W13 | 02 | 0010 | Beta | Apr 7, 2001 | Apr 14, 2001 | Apr 28, 2001 |
| № 9408 | S09 | W88 | 02 | 0160 | Alpha | Apr 1, 2001 | Apr 8, 2001 | Apr 22, 2001 |
| № 9407 | N11 | W54 | 03 | 0050 | Beta | Apr 4, 2001 | Apr 11, 2001 | Apr 24, 2001 |
| № 9406 | N28 | W50 | 04 | 0160 | Beta | 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.
