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The study of earthquakes is called seismology. Seismology studies the frequency, type and size of earthquakes. Earthquakes are measured using observations by seismometers, The magnitude of an earthquake and its intensity is recorded on a numerical scale known as Richter scale. On this scale ,3 or less is hardly noticeable. Earthquakes with magnitude of more than 6.5 can cause heavy damage (Earth science. 2001).The effects of an earthquake are strongest in the area which is near its epicenter. The extent of the earthquake vibration and further damage to the region is partly dependent on the features of the ground. The worst possible damage occurs in the desenly populated areas where structures are not built to withstand intense shaking. Damage and loss of life incurred during earthquake is due to falling buildings and fliying glass and objects. In certain areas, an eartquake can cause mudslides that can bury areas under it. Powerfull submarine eartehquakes cause tsunami or a chain of fast moving waves in the ocean that ripple outward from earthquake epicenter towards coastal areaas causing sourmountable damage (http//: www.USGS. Org). On an average, 1,000 earthquakes with intensities of 5.0 or greater are recorded each year.
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