Earthquakes


An earthquake is shaking or trembling of the earth that is volcanic or tectonic in origin.
"A broadly satisfying explanation of the majority of can be given in terms of what is called plate tectonics. The basic idea is that the Earth's outermost part also called the lithosphere consists of several large and fairly stable slabs of solid and relatively rigid rock called plates" (Branely 154).
These plates continuously move pushing and rubbing against each other.
Since the earliest of time people have been looking for an explanation for . The people of Maori in New Zealand believed the god of , Ruaumoko is said to have pressed into the earthquake as his mother turned face downward while ...

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particles rising from the earth's molten core. As the plates are driven against each other one will try to and eventually will slip underneath the other. When plates move quickly an earthquake is the result.
Before the availability of instruments capable of a quantitative measure of their magnitude, were classified according to their intensity. In 1931 a
seismologist came up with twelve degrees of intensity ranging from I (felt only by a few) to XII (total damage) this was called a Modified Mercalli scale. However according to Dr. Pignataro "Even with such scales, the subjectivity of the observer renders their use less then perfect, since today even experienced seismologists sometimes assign different intensities to the same earthquake." If the magnitude of an earthquake is to be compared worldwide, a measure is needed that does not depend (as does intensity) on the density of the population and type of construction. A strictly quantitative scale that can be applied to ...

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"Earthquakes." Essayworld.com. February 10, 2004. Accessed January 18, 2018. http://www.essayworld.com/essays/Earthquakes/2856.
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PAPER DETAILS
Added: 2/10/2004 04:36:51 PM
Category: Science & Nature
Type: Free Paper
Words: 1146
Pages: 5

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