Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 30, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9446 | S05 | W20 | 03 | 0010 | Beta | Apr 29, 2001 | May 6, 2001 | May 20, 2001 |
| № 9445 | N24 | E63 | 10 | 0190 | Beta | May 6, 2001 | May 13, 2001 | May 27, 2001 |
| № 9444 | S11 | E54 | 06 | 0050 | Beta | May 5, 2001 | May 12, 2001 | May 25, 2001 |
| № 9442 | N28 | E24 | 01 | 0060 | Alpha | May 3, 2001 | May 10, 2001 | May 24, 2001 |
| № 9441 | N07 | E13 | 28 | 0190 | Beta | May 2, 2001 | May 9, 2001 | May 22, 2001 |
| № 9437 | N10 | W30 | 02 | 0010 | Alpha | Apr 29, 2001 | May 5, 2001 | May 19, 2001 |
| № 9436 | S09 | W31 | 01 | 0110 | Alpha | Apr 29, 2001 | May 5, 2001 | May 19, 2001 |
| № 9433 | N18 | W61 | 30 | 0780 | Beta-Gamma-Delta | Apr 26, 2001 | May 3, 2001 | May 17, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to April 2001. The gray background is the average SSN index.
