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) | |
|---|---|---|---|---|---|---|---|---|
| № 9422 | S13 | E78 | 01 | 0050 | Alpha | Apr 15, 2001 | Apr 22, 2001 | May 5, 2001 |
| № 9421 | S15 | W42 | 02 | 0010 | Beta | Apr 6, 2001 | Apr 13, 2001 | Apr 26, 2001 |
| № 9420 | S07 | E49 | 02 | 0070 | Alpha | Apr 13, 2001 | Apr 19, 2001 | May 3, 2001 |
| № 9419 | N08 | W51 | 02 | 0010 | Alpha | Apr 5, 2001 | Apr 12, 2001 | Apr 25, 2001 |
| № 9418 | N26 | E32 | 11 | 0210 | Beta | Apr 11, 2001 | Apr 18, 2001 | May 2, 2001 |
| № 9417 | S08 | E01 | 20 | 0160 | Beta | Apr 9, 2001 | Apr 16, 2001 | Apr 29, 2001 |
| № 9415 | S21 | E21 | 23 | 0880 | Beta-Gamma | Apr 11, 2001 | Apr 18, 2001 | May 1, 2001 |
| № 9407 | N11 | W68 | 01 | 0100 | Alpha | Apr 4, 2001 | Apr 11, 2001 | Apr 24, 2001 |
| № 9406 | N27 | W60 | 01 | 0150 | 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.
