Viewing archive of Thursday, 16 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 |
|---|---|---|---|---|
| 127 48 | 2 | B4.97 | C3.39 | 7 |
Sunspot regions
Region 12905 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 10 10 | AXX | S12W11 | |
|
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Region 12906 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 9 5 | 60 -60 | CSO | S29W04 | |
|
||||
Region 12907 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 23 11 | 180 -80 | DAI | S19E27 | |
|
||||
Solar flares on this day | ||||
| C1.6 | ||||
Region 12908 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 10 4 | 210 -90 | DAO | S19E44 | |
|
||||
Region 12909 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 5 -1 | 150 | DAO | S19E66 | |
|
||||
Solar flares on this day | ||||
| B7.8 C1.4 C1.3 C3.4 C3.0 | ||||
Region 12910 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 6 | 20 | CRO | N13W17 | |
|
||||
Region 12911 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 3 | 20 | CRO | N19E70 | |
|
||||
Solar flares on this day | ||||
| C2.0 B7.8 C2.3 C3.0 | ||||
All times in UTC
Latest news
Tuesday, 17 March 2026
M2.7 solar flare, CME arrival possible
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CME impact! S4 solar radiation storm
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| Last X-flare | 2026/02/04 | X4.21 |
| Last M-flare | 2026/03/28 | M1.3 |
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| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2026 | 78.2 -34.3 |
| March 2026 | 84 +5.8 |
| Last 30 days | 84 +6.2 |
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