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) | |
|---|---|---|---|---|---|---|---|---|
| № 9439 | S22 | W28 | 01 | 0010 | Alpha | Apr 25, 2001 | May 2, 2001 | May 16, 2001 |
| № 9437 | N08 | E19 | 07 | 0050 | Beta | Apr 28, 2001 | May 5, 2001 | May 19, 2001 |
| № 9436 | S10 | E20 | 01 | 0120 | Alpha | Apr 29, 2001 | May 5, 2001 | May 19, 2001 |
| № 9435 | S21 | W51 | 05 | 0180 | Beta | Apr 23, 2001 | Apr 30, 2001 | May 14, 2001 |
| № 9433 | N16 | W15 | 82 | 1070 | Beta-Gamma-Delta | Apr 26, 2001 | May 3, 2001 | May 16, 2001 |
| № 9432 | N08 | W75 | 03 | 0050 | Beta | Apr 21, 2001 | Apr 28, 2001 | May 12, 2001 |
| № 9431 | S12 | W57 | 02 | 0020 | Alpha | Apr 23, 2001 | Apr 29, 2001 | May 13, 2001 |
| № 9429 | N08 | W85 | 01 | 0030 | Alpha | Apr 21, 2001 | Apr 27, 2001 | May 11, 2001 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1972, January to 2001, April. Gray background - average solar cycle.
