A mountain that forms as molten rock flows through a crack onto earth's surface

A hole in the earth's surface caused by the erosion of soil and bedrock

An instrument that measures and records motions of the ground including those of seismic waves generated by earthquakes

A region in the pacific that is prone to earthquakes and volcanic activity

A wide range of ground movement such as rock falls, failure of slopes and debris flows

A powerful, rotating storm that forms over the warm oceans near the equator

The emergence of hot molten rock, ash, and gases from a volcano

Water drains designed to drain excess rain and ground water from paved streets, parking lots, sidewalks, and roots.

A standard scale used to compare earthquakes rated in magnitude from 1-10.

A structure built parallel to the shore to control beach erosion.

A natural or artificial slope or wall, usually earthen and

often parallels the course of a river.

A landmass that is completely surrounded by water.

A point of land that juts out into the ocean.

The point on Earth’s surface directly above the focus of an earthquake.