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) | |
|---|---|---|---|---|---|---|---|---|
| № 3651 | N13 | E13 | 02 | 0010 | Beta | Apr 23, 2024 | Apr 30, 2024 | May 13, 2024 |
| № 3650 | S11 | E09 | 04 | 0030 | Beta | Apr 23, 2024 | Apr 29, 2024 | May 13, 2024 |
| № 3649 | N16 | W36 | 08 | 0020 | Beta | Apr 19, 2024 | Apr 26, 2024 | May 10, 2024 |
| № 3647 | S13 | W12 | 09 | 0160 | Beta-Delta | Apr 21, 2024 | Apr 28, 2024 | May 11, 2024 |
| № 3646 | N21 | E27 | 05 | 0020 | Beta | Apr 24, 2024 | May 1, 2024 | May 15, 2024 |
| № 3645 | S09 | W16 | 16 | 0210 | Beta | Apr 21, 2024 | Apr 27, 2024 | May 11, 2024 |
| № 3644 | N13 | E25 | 02 | 0120 | Beta | Apr 24, 2024 | May 1, 2024 | May 14, 2024 |
| № 3643 | S13 | W07 | 18 | 0130 | Beta | Apr 21, 2024 | Apr 28, 2024 | May 12, 2024 |
| № 3641 | N09 | W71 | 01 | 0010 | Alpha | Apr 17, 2024 | Apr 23, 2024 | May 7, 2024 |
| № 3639 | N29 | W13 | 19 | 0300 | Beta-Gamma | Apr 21, 2024 | Apr 28, 2024 | May 12, 2024 |
| № 3638 | S18 | W19 | 13 | 0060 | Beta | Apr 20, 2024 | Apr 27, 2024 | May 11, 2024 |
| № 3637 | S15 | W25 | 01 | 0010 | Alpha | Apr 20, 2024 | Apr 27, 2024 | May 11, 2024 |
| № 3636 | S21 | W42 | 03 | 0030 | Beta | Apr 19, 2024 | Apr 26, 2024 | May 9, 2024 |
| № 3635 | N22 | W81 | 02 | 0010 | Beta | Apr 16, 2024 | Apr 23, 2024 | May 6, 2024 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1995 to April 2024. The gray background is the average SSN index.
