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Related Flashcards
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Cards In This Set
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What is an Earhtquake?
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The vibrations in the ground that result from movement along breaks in Earths interior
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What is a fault?
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A break in Earths lithosphere where one block of rock moves toward, away, or past each other
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What are the three types of faults
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Srike slip, normal,and reverse
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Strike slip
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Two blocks of rock slide horrizontally past each other in opposite direction
Transform PB
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Normal
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Forces pull two blocks of rock apart block of rock above fault moves down relitive to the rock below the fault. Divergent PB
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Reverse
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Pushes two blocks of rock together block of rock above fault moves up relitive to the rock below the fault Convergent PB
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Seismic waves
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Energy that travels as vibrations on Earth released by rocks moving along faults
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Focus
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Seismick waves that originate where rocks first mover along fault inside the Earth
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Epicenter
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Location on earth surface directly above earhtquakes focus
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Primary waves(p-waves)
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Cause particle in the ground to move in a push pull motion similar to a coil spring
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Secondary waves(s-waves)
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Slower than p-waves cause particls move up/down at a right angle relitive to direction that wave travels
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Surface waves
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Cause particles to move up and down in rolling motion
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Seismologist
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Scientist who study Earthquakes
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Seismometer
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Instrument that measures and records study ground motion to determine distance seismic waves travel
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Seismogram
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Graphic illistration of seismic waves
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