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earthqauke vocabulary

QuestionAnswer
Epicenter Point on Earth's surface directly above an earthquake's focus.
Fault Fracture that occurs when rocks break and that results in relative movement in opoosing sides; can form as a result of compression being pulled apart or shear.
Focus Point deep inside the Earth where energy is released causing an earthquake
Lava Molten rock flowing into the Earth's surface
Lithosphere Rigid layer of Earth about 100km thick, made of crust and a part of the upper mantle
Magnitude A measure of energy released by an earthquake
Rifts Long, crack or fissure trough that forms at plate between tectonic plates moving apart of plate boundaries.
Seismic Wave Describes the ability of structures to stand up against vibrations caused by an earthquake.
Surface Waves The slowest and largest of the seismic waves and they cause the most destruction during an earthquake.
Seismograph Instrument used to record seismic waves.
P Waves Known as primary waves, they travel the fastest through rock causing it to vibrate in the same direction as waves are moving.
S Waves Caueses rock material to virbrate right where the right angles in the same direction which waves are moving
Tsunami Powerful siesmic sea wave that beigns over an ocean floor earthquake, can reach 30m in height when approaching land and can cause destruction the way the waves travels.
Volcanoes Cone- shapes hill or mountain formed when molten material reaches Earth's surface through a weak crystal area and piles up into a cone- shapd structure.
Pyroclastic Flow A hazard inhabitants of Montserrat.
Richter Scale Describes how much energy an earthquake releases.
Hypocenter Is the location beneath the earth’s surface where the rupture of the fault begins.
Selche An interal wave
Created by: katelu704
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