An area where magma from deep within the mantle melts through the crust above it.

Explosive volcanoes also are high in this element that is made of silicon and oxygen

The point underground at which an earthquake starts.

Hot melted rock that pours from an erupting volcano

A sudden movement of the ground caused by shifts in parts of the earth's crust, usually occurs along a fault.

a break in the earth's crust

a bowl-shaped opening at the top of a volcano

Volcano with a wide crater, developing from layers of lava.

the slowest moving wave but produces the most severe ground movements

a major volcanic belt formed by the many volcanoes that rim the Pacific Ocean

hot molten rock beneath Earth's surface

a monstrous wave that can occur after an earthquake or undersea landslide

The process by which an earthquake's violent movement suddenly turns loose soil into liquid mud.