Sunday, May 25, 2025

X-class flare as observed by GONG


 On 25 May 2025 at 1:46 UT, active region 14098 produced a major, X1.1 class flare. The flare was observed in spectral line H-alpha by GONG station at Big Bear, California. Left panel shows full disk image of the Sun at beginning of flare. White box marks approximate location of flaring active region. Middle panels show enlarged areas of this region during the first three minutes of flare. Panels on the right are images from LASCO C2 coronagraph showing a propagation of a Coronal Mass Ejection (CME) associated with this flare. The CME first appears in LASCO C2 observations at 02:24 UT or 38 minutes after the flare first observed by GONG.

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