X1.8 Flare December 20, 2014

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A major solar flare measuring X1.8 (R3-Strong Radio blackout) at its peak time erupted from Region 2242 ('beta-gamma-delta') at 00:28 UTC on December 20, 2014. The event started at 00:11 and ended at 00:55 UTC. A long duration 10cm radio burst lasting 52 minutes, with peak flux of 2300 sfu was also associated with