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shaking and vibration at the surface of the earth resulting from underground movement along a fault plane of from volcanic activity
(geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other
waves that travel outward from an Earthquake's focus and cause particles in rocks to move back and forth in the same direction the wave is moving
waves that travel outward from an earthquke's focus and move through Earth by causing particles in rocks to vibrate at right angles to the direction of the wave
waves of energy that reaches Earth's surface during an earthquake, travel outward from the epicenter, and move rock particles up & down & side to side
a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt
areas of volcanic activities that result from plumes of hot solid material that have risen from deep inside earths mantle
volcano built by alternating explosive and quiet eruptions that produce layers of tephra and lava; found mostly where Earth's plates come together and one plate sinks below the other
sand-sized particles of igneous rock that form when a spray of liquid magma is blown from a volcanic vent by escaping gas
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