There are some volcanically active spots that are in the middle of a tectonic plate.
The interior of the Earth is hot, while the surface or crust of the planet is cold. Between these layers are areas of molten rock. These molten rocks are less dense, so they easily break through cracks in the Earth's crust.
Magma is molten rock and is found beneath Korea. Beneath the volcano, in the underground spaces, magma accumulates.
