When a volcano, a mountain with a large circular hole at the top, explodes and flames and rocks come out of it.
Particular extent of space or surface prone to damaging effects caused by an earthquake.
An extremely large wave caused by a violent movement of the earth under the sea.
A violent outburst of volcanic waste.
Existence of an extremely large wave caused by a violent movement of the earth under the sea.
Noting explosive volcanic activity involving steam derived from ground water.
An enormous quantity of soft grey or black powder that is left after a substance has burned.
Displacement of hot liquid rock found just below the surface of the earth.
A sudden violent movement of the earth's surface, sometimes causing great damage
Curved sections of the planet's surface which are in constant motion.
