Viewing archive of Friday, 28 May 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 |
|---|---|---|---|---|
| 28 -6 | 0 | B1.37 | C9.47 | 2 |
Sunspot regions
Region 12824 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 -1 | 250 | DHO | N18W67 | |
|
||||
Solar flares on this day | ||||
| B2.1 B2.7 B2.7 B4.8 C9.5 | ||||
Region 12826 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 -5 | 280 | DKO | N22W86 | |
|
||||
Solar flares on this day | ||||
| B3.1 B1.8 B1.7 B5.0 B2.2 C3.0 B1.9 B3.0 B2.9 B2.1 | ||||
All times in UTC
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Space weather facts
| Last X-flare | 2025/12/01 | X1.9 |
| 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 | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 167.7 +75.9 |
| Last 30 days | 107.1 +13.7 |