How space weather powers auroras in the sky and threatens power grids on the ground

When an aurora lights up the sky, electric currents can also flow through the ground beneath your feet.

太空天氣中的亞暴能在磁尾釋放能量後幾分鐘內擾動地面磁場，進而感應出可能損害電網的電流。研究結合衛星與地面磁力儀數據，揭示極光與地面磁擾動的時序關系，並指出影響強弱取決於緯度與當地地質條件。