Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 27, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9442 | N28 | E59 | 01 | 0040 | Alpha | May 3, 2001 | May 10, 2001 | May 24, 2001 |
| № 9441 | N08 | E51 | 04 | 0030 | Beta | May 2, 2001 | May 9, 2001 | May 22, 2001 |
| № 9440 | N07 | E18 | 06 | 0010 | Beta | Apr 29, 2001 | May 6, 2001 | May 20, 2001 |
| № 9439 | S21 | W45 | 02 | 0020 | Beta | Apr 25, 2001 | May 1, 2001 | May 15, 2001 |
| № 9437 | N09 | E07 | 09 | 0040 | Beta | Apr 29, 2001 | May 5, 2001 | May 19, 2001 |
| № 9436 | S10 | E07 | 01 | 0160 | Alpha | Apr 29, 2001 | May 5, 2001 | May 19, 2001 |
| № 9435 | S21 | W65 | 04 | 0180 | Beta | Apr 23, 2001 | Apr 30, 2001 | May 14, 2001 |
| № 9433 | N17 | W25 | 64 | 0890 | Beta-Gamma-Delta | Apr 26, 2001 | May 3, 2001 | May 17, 2001 |
| № 9432 | N08 | W86 | 01 | 0030 | Alpha | Apr 22, 2001 | Apr 28, 2001 | May 12, 2001 |
| № 9431 | S11 | W71 | 01 | 0010 | Alpha | Apr 23, 2001 | Apr 29, 2001 | May 13, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to April 2001. The gray background is the average SSN index.
