Volcanoes are distributed all over the world, but are not found in every country. They are found mostly on the coastline, especially on tectonic plate boundaries. A few are located on 'hot spots'.
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Most volcanoes are located at the edges of crustal plates, especially the Pacific. Some are also located on "hot spots" such as the volcano in Hawaii. Many volcanoes that are on the edges are either near where the seafloor is spreading or when a plate is going down another.
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