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An earthquake is a natural disturbance, characterized by a convulsion or concussion of the ground. Earthquakes originate at a point within the crust, when a force pushing on a mass of rock causes it to slip suddenly. Energy is released and travels, through rock, to the surface in the form of waves causing vibrations and shaking. The word itself comes from the word earth, meaning ground or soil, and quake, meaning to shake or tremble.
The word earth comes from the Middle English either, which comes from Old English earth. These in turn came from the Greek erase, meaning to the ground. The word quake is derived from the Middle English queen, which comes from Old English chadian, meaning to shake or tremble. I was not until the year 1280, that the word earthquake was formed. Seism, earth tremor and cataclysm are other names for earthquakes, also seismism, earthquake and tremor.
Earthquakes, like hurricanes, are natural occurrences that bring about destruction and whose intensities are measured by specialists using specialized instruments. However, while a hurricanes intensity is measured by testing the wind speed, the atmospheric pressure and the level of rainfall, an earthquakes intensity is measured by testing the ground. The factors that are tested are, how fast the vibrations are moving from its source, how quickly the speed is changing, the frequency of the waves and the duration of the strong shaking. An earthquakes intensity is rated according to the Richter scale of earthquake measurements.
This scale is set from one to nine, one being the lowest intensity.
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Research essay sample on Shake Or Tremble Intensity Is Measured By Testing Word
