Interplate volcanism: There are some active sites of volcanism within the plate interiors. These interplate regions are called hotspots. A hotspot is believed to be related to the rising of a deep-mantle plume, which is caused by very slow convection of highly viscous material in the Earth’s mantle. Where a lithospheric plate moves over a hot spot, a chain of volcanic islands may be created. As the plate moves, the older volcanoes are transported away from the magma source and become extinct. The younger, active volcanoes are clustered at the end of the chain over the hot spot.
Ring of Fire: This is located in the Pacific Ocean and in this area there are a large number of earthquakes and volcanic eruptions. It has 452 volcanoes and it is the home of 75% of world''s active and dormant volcanoes.