How to survive a mega quake that could trigger a 100ft tsunami

Not far off the coast of the Pacific Northwest, a crack exists in the Earth’s crust. This fissure, along a fault line that stretches for almost 700 miles, will herald what experts say will be the worst natural disaster to hit North America.

For this is the ‘Big One’ – the long-anticipated that could one day bring devastation to the continent. Worst-case scenarios suggest it could devastate 140,000 square miles of the US and affect at least seven million people, many of them swept away by the tsunami that would come in the wake of the quake.

It would make the earthquake that struck off the coast of northern on Thursday – a magnitude 7 on the Richter scale – seem a mere tremor.

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