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Words and Definitions

QuestionAnswer
Epicenter Pont on earth's surface directly above an earthquakes forces.
Fault Fracture that occurs when rocks break and that results in relative movement of opposing sides;can form as a result of compression being pulled apart,or shear.
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 km thick, made of the crust and a part of the upper mantle.
Magnitude A measure of the energy released by an earthquake.
Rifts Long crack, fissure, or trough, that forms between tectonic plate moving apart at plate boundaries.
Seismic Safe Describes the ability of structures to stand up against the vibrations caused by an earthquake
Seismic Waves Earthquake waves, including primary waves, secondary waves, and surface waves.
Surface Waves travels at swallow depth and along earth's surface. Are the slowest and largest of the seismic waves, and they cause most of the destuction during an earthquake.
Seismograph Instrument used to record seismic waves.
Tsunami Powerful seismic sea wave that begins over an ocean-floor earthquake, can reach 30 m in height when approaching land, and can cause destruction in coastal areas.
Volcanoes cone-shaped hill or mountain formed when hot magma,solids and gas eruptonto earth's surface through a vent.
Pyroclastic flow Causing Destruction. Are another hazard for inhabitants of Monserrat. They can occur anytime on any side of the volcano, are massive avalanches of hot, glowing rock flowing on a cushion of intensely hot gases.
Richter Scale Measuring amplitude of seismic waves.
Pendulum seismoscope The first development. To measure the shaking of the ground during an earthquake .
hypocenter The hypocenter of an earthquake is the location beneath the earth's surface where the rupture of the fault begins.
seiche It is “an internal wave oscillating in a body of water” or, in other words, it is the sloshing of the water in your swimming pool, or any body of water, caused by the ground shaking in an earthquake.
Intensity Is a measure of the shaking created by the earthquake, and this value does vary with location.
Created by: wu704
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