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In the United States , the risk is highest along the Pacific coast in California, Washington, and Alaska. Plates meet along the Pacific coast, causing many active faults. In California , the Pacific plate and North American plate meet along the San Andreas fault. In Washington, earthquakes result from the subduction of the Juan de Fuca plate beneath the North American plate. In Alaska , subduction of the Pacific plate causes many earthquakes.

The eastern United States generally has a low risk of earthquakes because this region lies far from plate boundaries. But , the East has experienced some of the most powerful quakes in the nation's history. Scientist hypothesize that the continental plate forming most of North America is under stress. This stress could disturb faults that lie hidden beneath thick layers of soil and rock.

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Q: Why does the risk of quakes vary across the United States?
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Why does the risk of quakes vary across the united state?

In the United States , the risk is highest along the Pacific coast in California, Washington, and Alaska. Plates meet along the Pacific coast, causing many active faults. In California , the Pacific plate and North American plate meet along the San Andreas fault. In Washington, earthquakes result from the subduction of the Juan de Fuca plate beneath the North American plate. In Alaska , subduction of the Pacific plate causes many earthquakes. The eastern United States generally has a low risk of earthquakes because this region lies far from plate boundaries. But , the East has experienced some of the most powerful quakes in the nation's history. Scientist hypothesize that the continental plate forming most of North America is under stress. This stress could disturb faults that lie hidden beneath thick layers of soil and rock.


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