Viewing archive of Friday, 23 April 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 |
|---|---|---|---|---|
| 29 -13 | 0 | B2.4 | C2.47 | 6 |
Sunspot regions
Region 12816 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 8 2 | 50 | CRO | S24W31 | |
|
||||
Solar flares on this day | ||||
| B8.4 B2.9 B4.9 B9.6 C1.0 C1.4 B4.1 B6.8 | ||||
Region 12817 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 5 | 140 | CSO | N18W0* | |
|
||||
Solar flares on this day | ||||
| C1.3 C1.4 B4.1 B6.6 C2.3 C2.3 C2.4 | ||||
Region 12818 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 50 | HSX | S17E25 | |
|
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Space weather facts
| Last X-flare | 2024/11/06 | X2.39 |
| Last M-flare | 2024/11/20 | M1.1 |
| Last geomagnetic storm | 2024/11/10 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| October 2024 | 166.4 +25 |
| November 2024 | 142.7 -23.8 |
| Last 30 days | 155.2 +4.4 |