The East Coast earthquake came from a fault that's been asleep for hundreds of millions of years but suddenly reactivated

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The East Coast earthquake came from a fault that's been asleep for hundreds of millions of years but suddenly reactivated

Newark City employee Sushil Nagpal stands outside homes that were damaged and had to be evacuated after the earthquake on Friday,Spencer Platt/Getty ImagesThe 4.8-magnitude earthquake on the East Coast Friday came from ancient dormant faults.The faults formed when two continents collided about 500 million years ago, creating the Appalachians and Atlantic Ocean.Leftover stress from the retreat of Ice Age glaciers may have reactivated a sleeping f…