Sun flares
X-ray index
Diagram of the solar flare activity
X-ray emission of the Sun on Oct 20, 2017 and Oct 21, 2017 (GOES-15)
Solar flares on Oct 21, 2017
No solar flares of C, M and X-class were observed
Solar flares on Oct 20, 2017
1 solar flare was observed :
| Active region | Begin, UT | Max, UT | End, UT | |
|---|---|---|---|---|
| Flare of class M1.1 | 2685 | 23:10:00 | 23:28:00 | 23:37:00 |