US radio blackouts as historic sunspot fires off "remarkable" X-flare

Behemoth sunspot AR3664 unleashes its biggest solar flare yet, sparking radio blackouts on Earth (video)

Solar Stormwatch: NASA Catches Intense X1.1 Flare in Action

Gargantuan sunspot 15-Earths wide shoots powerful X-class flare toward Earth, triggering radio blackouts