Sun flares
X-ray index
Diagram of the solar flare activity
X-ray emission of the Sun on May 20, 2011 and May 21, 2011 (GOES-15)
Solar flares on May 21, 2011
No solar flares of C, M and X-class were observed
Solar flares on May 20, 2011
No solar flares of C, M and X-class were observed