Sun flares
X-ray index
Diagram of the solar flare activity
X-ray emission of the Sun on May 20, 2021 and May 21, 2021 (GOES-16)
Solar flares on May 21, 2021
1 solar flare was observed :
| Active region | Begin, UT | Max, UT | End, UT | |
|---|---|---|---|---|
| Flare of class C4.8 | 2824 | 19:15:00 | 19:28:00 | 19:32:00 |
Solar flares on May 20, 2021
No solar flares of C, M and X-class were observed