Question

what is an earthquake explanations in hundred line

Answer 1

an earthquake is a sudden shaking of earth's surface..... it is caused due to the movement of the tectonic plates..... Earthquakes are measured using observations from seismometer. The more numerous earthquakes smaller than magnitude 5 reported by national seismological observatories are measured mostly on the local magnitude scale, also referred to as the Ritcher scale l.These two scales are numerically similar over their range of validity. Magnitude 3 or lower earthquakes are mostly almost imperceptible or weak and magnitude 7 and over potentially cause serious damage over larger areas, depending on their depth. The largest earthquakes in historic times have been of magnitude slightly over 9, although there is no limit to the possible magnitude. Intensity of shaking is measured on the modified Mercalli sacle. The shallower an earthquake, the more damage to structures it causes. When the epicentre of a large earthquake is located offshore, the seabed may be displaced sufficiently to cause a tsunami Earthquakes can also trigger landslides, and occasionally volcanic activity. The objective of earthquake engineering is to foresee the impact of earthquakes on buildings and other structures and to design such structures to minimize the risk of damage earthquake. In recent studies, geologists claim that global warming is one of the reasons for increased seismic activity. According to these studies melting glaciers and rising sea levels disturb the balance of pressure on Earth's tectonic plates thus causing increase in the frequency and intensity of earthquake....

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