The Sun is an active threat to the systems civilization runs on: how flares and coronal mass ejections work, why geomagnetically induced currents kill transformers, the Carrington and Quebec and Gannon events, the Starlink loss of 2022, the L1 early-warning fleet that buys you minutes, and what grid operators actually do when NOAA issues a G5.
Satellites
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Space Weather: When the Sun Attacks Your Infrastructure