Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 3, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9414 | S21 | E55 | 01 | 0020 | Alpha | Apr 8, 2001 | Apr 15, 2001 | Apr 29, 2001 |
| № 9413 | N10 | W33 | 07 | 0030 | Beta | Apr 2, 2001 | Apr 9, 2001 | Apr 22, 2001 |
| № 9412 | S13 | E35 | 02 | 0040 | Alpha | Apr 7, 2001 | Apr 14, 2001 | Apr 27, 2001 |
| № 9408 | S09 | W34 | 24 | 0310 | Beta-Gamma | Apr 2, 2001 | Apr 8, 2001 | Apr 22, 2001 |
| № 9407 | N12 | W04 | 02 | 0080 | Alpha | Apr 4, 2001 | Apr 11, 2001 | Apr 24, 2001 |
| № 9406 | N27 | E01 | 02 | 0200 | Alpha | Apr 4, 2001 | Apr 11, 2001 | Apr 25, 2001 |
| № 9404 | S05 | W20 | 12 | 0050 | Beta | Apr 3, 2001 | Apr 9, 2001 | Apr 23, 2001 |
| № 9401 | N21 | W55 | 13 | 0140 | Beta-Gamma | Mar 31, 2001 | Apr 7, 2001 | Apr 21, 2001 |
| № 9397 | S08 | W51 | 09 | 0080 | Beta | Mar 31, 2001 | Apr 7, 2001 | Apr 21, 2001 |
| № 9395 | S13 | W63 | 01 | 0020 | Alpha | Mar 30, 2001 | Apr 6, 2001 | Apr 20, 2001 |
| № 9393 | N16 | W73 | 40 | 1810 | Beta-Gamma-Delta | Mar 30, 2001 | Apr 6, 2001 | Apr 19, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to April 2001. The gray background is the average SSN index.
