Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 21, 2024. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 3656 | S12 | E85 | 01 | 0020 | Alpha | Apr 28, 2024 | May 5, 2024 | May 19, 2024 |
| № 3655 | S27 | E75 | 03 | 0020 | Beta | Apr 28, 2024 | May 5, 2024 | May 19, 2024 |
| № 3654 | S07 | E73 | 03 | 0010 | Beta | Apr 28, 2024 | May 4, 2024 | May 18, 2024 |
| № 3653 | N03 | E73 | 01 | 0010 | Alpha | Apr 28, 2024 | May 4, 2024 | May 18, 2024 |
| № 3652 | N15 | E44 | 07 | 0060 | Beta | Apr 25, 2024 | May 2, 2024 | May 16, 2024 |
| № 3650 | S11 | E05 | 08 | 0070 | Beta | Apr 22, 2024 | Apr 29, 2024 | May 13, 2024 |
| № 3648 | N18 | E11 | 01 | 0010 | Alpha | Apr 23, 2024 | Apr 30, 2024 | May 13, 2024 |
| № 3647 | S13 | W15 | 12 | 0220 | Beta-Delta | Apr 21, 2024 | Apr 28, 2024 | May 11, 2024 |
| № 3646 | N21 | E27 | 08 | 0030 | Beta | Apr 24, 2024 | May 1, 2024 | May 15, 2024 |
| № 3645 | S09 | W21 | 20 | 0290 | Beta-Gamma | Apr 20, 2024 | Apr 27, 2024 | May 11, 2024 |
| № 3644 | N13 | E23 | 02 | 0150 | Beta | Apr 24, 2024 | May 1, 2024 | May 14, 2024 |
| № 3643 | S13 | W03 | 10 | 0080 | Beta | Apr 22, 2024 | Apr 29, 2024 | May 12, 2024 |
| № 3641 | N10 | W74 | 01 | 0010 | Alpha | Apr 16, 2024 | Apr 23, 2024 | May 7, 2024 |
| № 3639 | N28 | W16 | 22 | 0260 | Beta-Gamma | Apr 21, 2024 | Apr 28, 2024 | May 12, 2024 |
| № 3638 | S18 | W22 | 11 | 0080 | Beta | Apr 20, 2024 | Apr 27, 2024 | May 11, 2024 |
| № 3637 | S13 | W30 | 02 | 0010 | Alpha | Apr 20, 2024 | Apr 27, 2024 | May 10, 2024 |
| № 3636 | S21 | W45 | 01 | 0010 | Alpha | Apr 19, 2024 | Apr 25, 2024 | May 9, 2024 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1995 to April 2024. The gray background is the average SSN index.
