HAZARDS OF CRUSTAL MOVEMENT
LIQUEFACTION--- A process by which water-saturated sediment temporarily loses strength and acts as a fluid, like when you wiggle your toes in the wet sand near the water at the beach. This effect can be caused by earthquake shaking.
EARTHQUAKE--- Earthquake is a term used to describe both sudden slip on a fault, and the resulting ground shaking and radiated seismic energy caused by the slip, or by volcanic or magmatic activity, or other sudden stress changes in the earth.
LANDSLIDE-- A landslide is a movement of surface material down a slope.
LAHAR-- a hot or cold mixture of water and rock fragments flowing down the slopes of a volcano and (or) river valleys
VOLCANO-- A volcano is a mountain that opens downward to a pool of molten rock below the surface of the earth
PYROCLASTIC FLOW-- are high-density mixtures of hot, dry rock fragments and hot gases that move away from the vent that erupted them at high speeds.