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In a magnitude 5 earthquake, the ground shakes violently and it's often impossible to stay upright. This is caused by about 50-120 cm of displacement of the ground. But how much would the ground move if a magnitude 11 earthquake were to happen? This is roughly equivalent to the shaking the dinosaurs would have felt right after the asteroid hit, and I'm well aware that the Earth isn't capable of generating quakes this powerful.

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  • $\begingroup$ A million times as much as magnitude 5? en.wikipedia.org/wiki/… $\endgroup$
    – Keith McClary
    Jul 1, 2021 at 18:10
  • $\begingroup$ Then the Earth's crust would move 500-1,200 kilometers... probably a bit of a high estimate! $\endgroup$
    – Wesley Adams
    Jul 8, 2021 at 17:23

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