Viewing archive of Tuesday, 21 December 2021 - Sunspot regions
Courtesy of SDO, SOHO (NASA) and the [MDI, AIA, EVE, and/or HMI] consortium.
| Sunspot number | New regions | Background flux | Maximum flux | C | M |
|---|---|---|---|---|---|
| 147 32 | 3 2 | B7.49 | M1.48 | 11 | 2 |
Sunspot regions
Region 12907 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 14 1 | 200 50 | DAI | S21W40 | |
|
||||
Solar flares on this day | ||||
| C5.6 | ||||
Region 12908 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 18 8 | 100 | DSI | S16W25 | |
|
||||
Solar flares on this day | ||||
| C2.9 C3.3 C4.1 C5.0 C1.0 C5.0 | ||||
Region 12909 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 3 -2 | 80 -20 | HAX | S19W13 | |
|
||||
Solar flares on this day | ||||
| C4.9 | ||||
Region 12910 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 3 1 | 20 10 | CRO | N15W79 | |
|
||||
Region 12911 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 -1 | 20 | HRX | N19E17 | |
|
||||
Region 12912 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 30 | HSX | S11E38 | |
|
||||
Region 12913 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 10 | AXX | S28E18 | |
|
||||
Region 12914 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 | 10 | BXO | S17E23 | |
|
||||
Region 12915 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 3 | 30 | DSO | N16E34 | |
|
||||
Region 12916 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 100 | HSX | S18E82 | |
|
||||
Solar flares on this day | ||||
| M1.1 M1.4 C2.0 | ||||
All times in UTC
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| Last M-flare | 2025/12/06 | M8.1 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
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| December 2025 | 175.4 +83.6 |
| Last 30 days | 106.4 +12.9 |