Earthquake
An earthquake, also known as a tremor, is the consequence of a swift release of energy in the Earth's crust that creates seismic waves. Earthquakes are recorded with a seismometer, also known as seismograph. The moment magnitude of an earthquake is usually reported, with scale 3 or lower earthquakes being hardly noticeable. Scale 7 causes severe damage over huge areas. Intensity of trembling is calculated on the customized scale. At the Earth's exterior, earthquakes marked themselves by trembling and from time to time displacing the soil. Whilst a hefty earthquake epicentre is positioned offshore, the seabed at times suffers ample displacement to cause a tsunami or a fatal disaster. The trembling in earthquakes can also generate landslides and sporadically volcanic commotion. Basically, in its most generic sense, the term earthquake is used to illustrate any seismic occurrence whether a natural phenomenon or an incident caused by humans that produces seismic waves. Earthquakes are caused generally by rupture of geological faults, but also by volcanic movement, landslides, mine blasts, and nuclear experiments.
Bangladesh is vulnerable to earthquake. Unplanned construction including mushrooming growth of the skyscrapers, especially in the capital city Dhaka, is enhancing the fear of an earthquake.
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