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Earthquakes

Across
a series of vibrations induced in the earth's crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating.
The curved lines of islands.
A number describing the severity of an earthquake in terms of its effects on the earth's surface and on humans and their structures.
a graph output by a seismograph. ... The energy measured in a seismogram may result from an earthquake or from some other source, such as an explosion.
are a type of surface acoustic wave that travel along the surface of solids.
A seismic wave is an elastic wave generated by an impulse such as an earthquake or an explosion.
an explanation for how energy is released during an earthquake.
horizontally polarized surface waves.
a seismic wave that moves through the interior of the earth.
a small earthquake or tremor that follows a major earthquake.
a number that characterizes the relative size of an earthquake.
an instrument scientists use to measure the strength of an earthquake.
one of many gravitational water waves propagated outward in all directions from the epicenter of a submarine earthquake.
Down
The point within the Earth where seismic waves originate.
A seismic wave that travels across the surface of the Earth as opposed to through it.
a large ocean wave that is caused by sudden motion on the ocean floor.
used to rate the strength or total energy of earthquakes.
The measurement of an earthquakes size and strength in seismic moments.
The distance between the focus and the epicenter of an earthquake.
a point, directly above the true center of disturbance, from which the shock waves of an earthquake apparently radiate.