Sunspots and active regions — December 20, 2021
Sunspots and active regions
By the end of the day, the following active regions with sunspots could be observed on the Sun's surface
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 2912 | S12 | E64 | 01 | 0040 | Alpha | Dec 26, 2021 | Jan 2, 2022 | Jan 15, 2022 |
| № 2911 | N20 | E25 | 03 | 0050 | Alpha | Dec 23, 2021 | Dec 30, 2021 | Jan 13, 2022 |
| № 2910 | N13 | W53 | 02 | 0020 | Alpha | Dec 17, 2021 | Dec 24, 2021 | Jan 6, 2022 |
| № 2909 | S21 | E16 | 04 | 0120 | Beta | Dec 22, 2021 | Dec 29, 2021 | Jan 12, 2022 |
| № 2908 | S21 | E02 | 13 | 0240 | Beta | Dec 21, 2021 | Dec 28, 2021 | Jan 11, 2022 |
| № 2907 | S21 | W14 | 15 | 0250 | Beta-Gamma | Dec 20, 2021 | Dec 27, 2021 | Jan 10, 2022 |
| № 2906 | S29 | W45 | 01 | 0020 | Alpha | Dec 17, 2021 | Dec 25, 2021 | Jan 8, 2022 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1992, January to 2021, December. Gray background - average solar cycle.
