Viewing archive of Wednesday, 21 July 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 |
|---|---|---|---|---|
| 86 27 | 2 1 | B2.29 | C1.34 | 2 |
Sunspot regions
Region 12842 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 7 -3 | 80 -60 | DSI | N26W67 | |
|
||||
Solar flares on this day | ||||
| B8.7 B9.4 | ||||
Region 12845 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 3 | 60 60 | DSO | S15W60 | |
|
||||
Solar flares on this day | ||||
| B6.4 B7.7 C1.3 B5.1 | ||||
Region 12846 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 7 2 | 90 | CSO | N25E47 | |
|
||||
Region 12847 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 3 | 20 | CRO | S27E61 | |
|
||||
Solar flares on this day | ||||
| B3.4 B5.9 | ||||
Region 12848 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 | 10 | BXO | N19E17 | |
|
||||
Region 12849 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 0 | AXX | S18E75 | |
|
||||
Solar flares on this day | ||||
| C1.2 | ||||
All times in UTC
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| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/08 | M1.1 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 162.7 +70.9 |
| Last 30 days | 108 +13.3 |