Stormy sun could knock out power grids

Stormy sun could knock out power grids

An upcoming cycle of stormy solar activity risks causing damage to electrical transformers and threatening vulnerable energy infrastructure around the globe, a report by an insurance group says.

The sun follows a predictable 11 year activity cycle, with the next period of stormy activity expected to begin in 2012-13.

The report by German insurance group Allianz (ALVG.DE) said a high impact solar storm, not easily predicted due to its recorded rarity, could cause blackouts and economic losses of over $1 trillion and that the worst case scenario would be even worse.

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