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Earthquake Vocabulary

Name: _________________________
Date: __________________________
Hr.: ___________
Across
a tracing of earthquake motion (paper with squiggly lines)
instrument buried in the ground to detect earthquake vibrations
small earthquakes in underground caverns and mines caused by the explosion of rocks
the process of determining the location of a point by measuring angles to it from three known points
magnitude scale that is more accurate for larger earthquakes
a seismic wave that shakes the ground up and down as it travels forward
scale that shows the levels of earthquake intensity
the spot or origin where the earthquake began -- often below the surface of the earth
an earthquake that is the result of the detonation of a nuclear or chemical device (bomb).
an earthquake that occurs when earth's crust moves along plate tectonic boundaries
a term used to describe ground shaking and radiated seismic waves
a numerical scale for expressing the MAGNITUDE of an earthquake based on seismogram readings
Down
the instrument that records vibrations in the ground (writes or prints information on paper)
the amount of damage caused by an earthquake
a seismic wave that shakes the ground back and forth (compression) in the direction the wave is moving
the time gap between earthquake arrivals, used to calculate distance to the epicenter
the study of earthquakes and the structure of the Earth, by both naturally and artificially generated earthquakes
the measure of the strength of an earthquake
a seismic wave that moves through the interior of the earth
a fracture along which the blocks of crust on either side have moved
a sea wave caused by large oceanic earthquakes, major submarine slides, or exploding volcanic islands.
the point on Earth’s surface directly above an earthquake’s starting point
a seismic wave that is trapped in the crust of the earth
an earthquake that results from volcanic activity