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terms and definitions

WordDefinition
epicenter- Point on the Earth's surface directly above an earthquakes focus.
fault- fracture that occurs when rocks break and that results in relative movement in opposing sides.
focus- point deep inside Earth where energy is released, causing an earthquake.
lava- molten rock flowing onto Earth's surface.
lithosphere- rigid layer of earth about 100 kilometers thick.
magnitude- a measure of the energy released by an earthquake.
rifts- long crack
seismic waves- Earthquake waves
seismic safe- describes the ability of structures to stand up against the vibrations caused by an earthquake.
surface waves- a seismic wave that travels along or parallel to the Earth's surface.
seismograph- instrument used to record seismic waves.
tsunami- powerful sea wave.
volcanoes- cone-shaped hill or mountain that spews hot magma.
pyroclastic flow- hazard for inhabitants.
richter scale- measuring amplitude of seismic waves.
Created by: olandra.o706
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