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) | |
|---|---|---|---|---|---|---|---|---|
| № 9427 | S08 | W39 | 07 | 0060 | Beta | Apr 12, 2001 | Apr 19, 2001 | May 2, 2001 |
| № 9426 | S10 | E13 | 06 | 0060 | Beta | Apr 16, 2001 | Apr 23, 2001 | May 6, 2001 |
| № 9424 | S18 | W34 | 06 | 0030 | Beta | Apr 12, 2001 | Apr 19, 2001 | May 3, 2001 |
| № 9422 | S12 | W04 | 06 | 0050 | Beta-Gamma | Apr 15, 2001 | Apr 22, 2001 | May 5, 2001 |
| № 9420 | S08 | W31 | 03 | 0040 | Beta | Apr 13, 2001 | Apr 19, 2001 | May 3, 2001 |
| № 9418 | N26 | W46 | 05 | 0120 | Beta | Apr 11, 2001 | Apr 18, 2001 | May 2, 2001 |
| № 9417 | S07 | W81 | 07 | 0120 | Beta | Apr 9, 2001 | Apr 16, 2001 | Apr 29, 2001 |
| № 9415 | S22 | W59 | 18 | 0390 | Beta-Gamma-Delta | Apr 10, 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.
