Sun Unleashes Strongest Flare of 2025, Causing Global Radio Blackouts
On Nov. 11, 2025, the Sun erupted with an X5.1-class flare, disrupting shortwave communications across Africa and Europe. The flare’s X-rays and UV radiation ionized Earth’s upper atmosphere, causing R3-level radio blackouts. NOAA warned that a coronal mass ejection could reach Earth on Nov. 12, potentially triggering strong geomagnetic storms and vivid auroras.
