Viewing archive of Tuesday, 21 September 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 |
|---|---|---|---|---|
| 50 -1 | 0 -2 | B1.03 | C1.85 | 3 |
Sunspot regions
Region 12871 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 8 2 | 310 70 | DKO | S28E37 | |
|
||||
Solar flares on this day | ||||
| B2.7 B2.1 B4.1 B3.1 B2.3 B3.0 B1.8 B3.3 B1.9 B1.7 B2.1 C1.1 B1.6 B5.2 | ||||
Region 12872 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 -3 | 10 -20 | BXO | N18E25 | |
|
||||
Solar flares on this day | ||||
| B4.2 | ||||
Region 12873 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 8 | 110 100 | DAO | N25W23 | |
|
||||
Solar flares on this day | ||||
| B2.3 C1.1 B8.9 B5.2 C1.8 B1.6 | ||||
All times in UTC
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Space weather facts
| Last X-flare | 2024/12/08 | X2.2 |
| Last M-flare | 2024/12/22 | M1.0 |
| Last geomagnetic storm | 2024/12/17 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2024 | 152.5 -13.9 |
| December 2024 | 103.3 -49.2 |
| Last 30 days | 115.4 -40.8 |