Miscalculation by Spanish power grid operator REE contributed to massive blackout, report finds ReutersSpain says April blackout was caused by grid failures and poor planning, not a cyberattack CNNSpain’s government blames huge blackout on grid regulator and private firms BBCFull-scale power failure that shut down Iberian peninsula had no single cause but was not cyber-attack, Spain says – as it happened The GuardianBlackout in Spain and Portugal caused by ‘voltage surge’ DW
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