Question

Why are there volcances along the coast of the United States? (Geography)​

Answer 1

Answer:

Most volcanoes of Canada and US occur along the west coast because the pacific ocean plate is subducting under the north American plate. ... Hot mantle rock rises where the plates are moving apart, this releases pressure on the mantle, which lowers its temperature.

Answer 2

Of course, these volcanoes are caused by the abundance of convergent plate boundaries around the Pacific. The Pacific Ring of Fire is where the majority of the volcanic activity on the Earth occurs. A description of the Pacific Ring of Fire along western North America is a description of the plate boundaries.