Violent motions

The point on earth's surface directly above the focus

a steeply sloped volcano made of pyroclastic material from explosive eruptions

a wall of water that moves ashore when a hurricane strikes land

a tropical cyclone forming in the Atlantic and eastern Pacific Oceans

The point beneath the earth's surface where rock breaks and causes an earthquake

a tall, cone shaped mountain made of alternating layers of lava and pyroclastic material

the opening in a volcano through which magma and gases escape

a rapidly rotating column of air that extends from a cumulonimbus cloud and touches the ground

a gently sloping mountain made of lava released from nonexplosive eruptions

a row of severe thunderstorms

a type of seismic wave that compresses and expands

a type of seismic wave that moves side to side and up and down

a rotating storm system originating over warm waters with wind speeds of 74 mph or greater

a scale used to rate tornado intensity