A powerful X5.1 solar flare on November 11, 2025, sent high-speed protons toward Earth, producing the strongest radiation spike detected in nearly two decades. The event caused a rare ground-level enhancement, briefly raising radiation at flight altitude to ten times normal. While not dangerous this time, scientists warn larger flares could threaten avionics and commu…A powerful X5.1 solar flare on November 11, 2025, sent high-speed protons toward Earth, producing the strongest radiation spike detected in nearly two decades. The event caused a rare ground-level enhancement, briefly raising radiation at flight altitude to ten times normal. While not dangerous this time, scientists warn larger flares could threaten avionics and commu…