Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 6, 2001. Coordinates are given as of the end of the day.
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 9420 | S08 | E78 | 01 | 0040 | Alpha | Apr 13, 2001 | Apr 20, 2001 | May 3, 2001 |
| № 9419 | N10 | W31 | 01 | 0000 | Alpha | Apr 5, 2001 | Apr 11, 2001 | Apr 25, 2001 |
| № 9418 | N27 | E60 | 08 | 0230 | Beta | Apr 12, 2001 | Apr 19, 2001 | May 3, 2001 |
| № 9417 | S08 | E29 | 13 | 0050 | Beta | Apr 9, 2001 | Apr 16, 2001 | Apr 29, 2001 |
| № 9416 | N17 | W44 | 04 | 0030 | Beta | Apr 4, 2001 | Apr 10, 2001 | Apr 24, 2001 |
| № 9415 | S21 | E49 | 19 | 0710 | Beta-Gamma | Apr 11, 2001 | Apr 18, 2001 | May 1, 2001 |
| № 9414 | S23 | E22 | 01 | 0000 | Alpha | Apr 9, 2001 | Apr 15, 2001 | Apr 29, 2001 |
| № 9413 | N10 | W69 | 06 | 0130 | Beta | Apr 2, 2001 | Apr 8, 2001 | Apr 22, 2001 |
| № 9412 | S14 | E01 | 01 | 0000 | Alpha | Apr 7, 2001 | Apr 14, 2001 | Apr 27, 2001 |
| № 9408 | S09 | W72 | 10 | 0260 | Beta | Apr 1, 2001 | Apr 8, 2001 | Apr 22, 2001 |
| № 9407 | N11 | W39 | 02 | 0090 | Beta | Apr 4, 2001 | Apr 11, 2001 | Apr 24, 2001 |
| № 9406 | N29 | W33 | 03 | 0140 | Beta | Apr 4, 2001 | Apr 11, 2001 | Apr 25, 2001 |
| № 9401 | N24 | W82 | 04 | 0100 | Beta | Apr 1, 2001 | Apr 7, 2001 | Apr 21, 2001 |
| № 9397 | S09 | W91 | 01 | 0030 | Alpha | Mar 31, 2001 | Apr 7, 2001 | Apr 20, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to April 2001. The gray background is the average SSN index.
