Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 29, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9445 | N23 | E73 | 04 | 0060 | Beta | May 6, 2001 | May 13, 2001 | May 27, 2001 |
| № 9444 | S11 | E64 | 03 | 0060 | Alpha | May 5, 2001 | May 12, 2001 | May 25, 2001 |
| № 9442 | N28 | E31 | 01 | 0070 | Alpha | May 3, 2001 | May 10, 2001 | May 24, 2001 |
| № 9441 | N07 | E20 | 16 | 0190 | Beta | May 2, 2001 | May 9, 2001 | May 22, 2001 |
| № 9440 | N08 | W11 | 04 | 0030 | Beta | Apr 29, 2001 | May 6, 2001 | May 20, 2001 |
| № 9439 | S23 | W71 | 02 | 0030 | Alpha | Apr 25, 2001 | May 2, 2001 | May 16, 2001 |
| № 9437 | N10 | W22 | 02 | 0020 | Beta | Apr 29, 2001 | May 5, 2001 | May 19, 2001 |
| № 9436 | S10 | W22 | 01 | 0140 | Alpha | Apr 29, 2001 | May 5, 2001 | May 19, 2001 |
| № 9435 | S20 | W95 | 01 | 0100 | Alpha | Apr 23, 2001 | Apr 30, 2001 | May 14, 2001 |
| № 9433 | N17 | W53 | 39 | 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.
