The X5.1-class eruption from sunspot AR4274 is this year's most powerful solar flare and Earth is in the firing line.

The back-to-back eruptions caused radio blackouts across two hemispheres as the active sunspots turn to face Earth.

On 4 November, AR 4274 fired an X1.8 flare, followed by an X1.7 flare on 09 November and an X1.2 flare on 10 November. Now, ...