Sun unleashes strongest solar flare of 2025, sparking radio blackouts across Africa and EuropeBy otako_fzbgs4 / November 11, 2025 The X5.1-class eruption from sunspot AR4274 is this year’s most powerful solar flare and Earth is in the firing line. Related posts: Catch solar bursts in new citizen science project Sped-up simulation of Hera’s Mars flyby Hera asteroid mission’s Mars flyby Watch live: Images from Hera’s Mars flyby