GONG/Learmonth (Australia) took observations of a large two-ribbon flare, which was the source of Earth-directed halo Coronal Mass Ejection (CME). M8.2 class flare started at about 23:31 UT on 30 May 2025 near active region 14100. Left panel shows the flare location at about the maximum of its development as observed by GONG. Two panels on the right show the location of bright CME front as observed by LASCO C2 and C3 coronagraphs. NOAA's Space Weather Prediction Center issued G4 (Severe) Geomagnetic Storm Watch in Effect for 2 June UTC-Day.
Video shows the full development of H-alpha flare from GONG/LE observations.
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