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) | |
|---|---|---|---|---|---|---|---|---|
| № 9419 | N08 | W08 | 05 | 0010 | Beta | Apr 5, 2001 | Apr 12, 2001 | Apr 26, 2001 |
| № 9418 | N23 | E69 | 01 | 0130 | Alpha | Apr 11, 2001 | Apr 18, 2001 | May 2, 2001 |
| № 9417 | S09 | E33 | 01 | 0000 | Alpha | Apr 8, 2001 | Apr 15, 2001 | Apr 29, 2001 |
| № 9416 | N17 | W32 | 06 | 0040 | Beta | Apr 4, 2001 | Apr 10, 2001 | Apr 24, 2001 |
| № 9415 | S21 | E60 | 09 | 0680 | Beta | Apr 11, 2001 | Apr 18, 2001 | May 1, 2001 |
| № 9414 | S22 | E31 | 01 | 0010 | Alpha | Apr 8, 2001 | Apr 15, 2001 | Apr 29, 2001 |
| № 9413 | N11 | W57 | 07 | 0110 | Beta | Apr 2, 2001 | Apr 8, 2001 | Apr 22, 2001 |
| № 9412 | S14 | E12 | 01 | 0010 | Alpha | Apr 7, 2001 | Apr 14, 2001 | Apr 27, 2001 |
| № 9408 | S08 | W59 | 13 | 0300 | Beta | Apr 2, 2001 | Apr 8, 2001 | Apr 22, 2001 |
| № 9407 | N11 | W28 | 01 | 0060 | Alpha | Apr 4, 2001 | Apr 11, 2001 | Apr 24, 2001 |
| № 9406 | N27 | W22 | 02 | 0190 | Alpha | Apr 4, 2001 | Apr 11, 2001 | Apr 25, 2001 |
| № 9404 | S03 | W46 | 02 | 0000 | Alpha | Apr 3, 2001 | Apr 9, 2001 | Apr 23, 2001 |
| № 9401 | N24 | W70 | 03 | 0100 | Beta | Apr 1, 2001 | Apr 8, 2001 | Apr 21, 2001 |
| № 9397 | S07 | W78 | 01 | 0030 | Alpha | Mar 31, 2001 | Apr 7, 2001 | Apr 20, 2001 |
| № 9395 | S13 | W85 | 01 | 0000 | Alpha | Mar 31, 2001 | Apr 6, 2001 | Apr 20, 2001 |
| № 9393 | N18 | W94 | 03 | 0280 | Beta | Mar 30, 2001 | Apr 6, 2001 | Apr 19, 2001 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1972, January to 2001, April. Gray background - average solar cycle.
