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Solar storms aren't the only thing which has taken down North East Canada's power grid, either .. the North American ice storm of 1998 took out 3 million people's power for up to a month and a half.
Their grid still remains at risk from similar events. The UK, Arkansas and Moscow have also had similar vulnerabilities exposed recently.
I wonder how the risks compare (which of the two is more likely), and which of the two has a greater sustained impact ?
(It kind of puts it all in a clearer perspective, looking at it this way).
Cheers
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