Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 19, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9433 | N14 | E74 | 02 | 0150 | Beta | Apr 26, 2001 | May 2, 2001 | May 16, 2001 |
| № 9432 | N08 | E20 | 06 | 0030 | Beta | Apr 22, 2001 | Apr 28, 2001 | May 12, 2001 |
| № 9431 | S11 | E36 | 01 | 0000 | Alpha | Apr 23, 2001 | Apr 30, 2001 | May 13, 2001 |
| № 9430 | S17 | W59 | 03 | 0020 | Beta | Apr 16, 2001 | Apr 22, 2001 | May 6, 2001 |
| № 9429 | N08 | E09 | 01 | 0080 | Alpha | Apr 21, 2001 | Apr 27, 2001 | May 11, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to April 2001. The gray background is the average SSN index.
