Is technology making us vulnerable?

At the time, the event caused some minor magnetic disruption to telegraph wires, but for the most part there was little damage caused by such a spectacular event, its main legacy being the fantastic displays of light across the sky in early September. But should a solar flare happen on the scale of the Carrington Event now (and there’s a 12 per cent chance of one hitting the Earth before 2022), the effects might have a radically different impact on our advanced civilisation. If a CME with the same intensity were to hit the Earth head-on, it could cause catastrophic damage.

A National Research Council report in 2008 estimated that another Carrington Event could lead to a disruption of US infrastructure that could take between four and 10 years – and trillions of dollars – to recover from. Particularly vulnerable are the massive transformers on which our entire power system relies. Massive fluxes in magnetic energy can easily overload a transformer’s magnetic core, leading to overheating and melting of their copper cores. In the worst-case scenario, a repeat of the Carrington Event would cripple our infrastructure so severely it could lead to an apocalyptic breakdown of society, a threat utterly unknown to our ‘less civilised’ ancestors.

via Is technology making us vulnerable? – Colin Dickey – Aeon.

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