Why are there not as many earthquakes or volcanoes on the east coast of North America as the west coast of North America?

The main reason for the difference, Ebel says, is that the California coast is right above the boundary of two of the tectonic plates that make up the Earth's crust. By contrast, Virginia is in the middle of a plate that stretches from the California coast to the middle of the Atlantic Ocean.

Explanation:

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