Earthquakes

Earthquakes What is an Earthquake? An Earthquake is the shaking of the footings coat caused by fast movement of the earths rocky outer layer. The sudden shaking of the fundament that proceeds when masses of rock change position below the Earths surface is called an earthquake. The shifting masses send out shock waves that may be powerful enough to alter the surface of the Earth, laggard up cliffs and opening vast cracks in the ground. Earthquakes, called temblors by scientists, occur almost continuously. Fortunately, most of them can be detected solely by sensitive instruments called seismographs.

Others are felt as thin tremors. Some of the rest, however, cause major catastrophes. They produce such sad and dramatic effects as destroyed cities, broken dams, earth slides, giant sea waves called tsunamis, and volcanic eruptions. A very great earthquake usually occurs at least once a year in some part of the world. On the intermediate about 10,000 people ...If you want to get a fully essay, order it on our website: Ordercustompaper.com

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