Earthquakes And Its Causes
Earthquakes And Its Causes
Earthquakes: An earthquake is a major demonstration of the power of the tectonics forces caused by endogenetic thermal conditions of the interior of the earth. It is a form of energy of wave motion transmitted through the surface layer of the earth in widening circles from a point of sudden energy release, the focus. The magnitude or intensity of energy released by an earthquake is measured by the Richter scale. This scale has no upper limit of number because it is logarithmic scale.The place of origin of an earthquake is called focus, which is always hidden inside the earth but its depth varies from place to place. The place on the ground surface, which is perpendicular to the buried 'focus' or 'hypocentre', recording the seismic waves for the first time is called epicentre. The waves generated by an earthquake are called 'seismic waves', which are recorded by an instrument called seismograph. The science that deals with the seismic waves is called seismology.
Causes of Earthquakes: Earthquakes are caused mainly due to disequilibrium in any part of the crust of the earth. A number of causes have been assigned to cause disequilibrium or isostatic imbalance in the earth's crust such as volcanic eruptions, faulting and folding, upwarping and downwarping, gaseous expansion and contraction inside the earth, hydrostatic pressure of man-made water bodies like reservoirs and lakes, etc. Elastic Rebound Theory of H.F. Reid provides an excellent explanation of these processes and factors.
Distribution of Earthquakes: A detailed study of the earthquake clarifies that they are intimately related to the converging plate boundaries. The Pacific Ring of Fire is the manifestation of the same fact where more than 65% of the world's earthquakes and volcanic eruptions take place. That is why the countries located along the borders of the Pacific like Chile, Peru, Ecuador, Japan, Philippines etc. are more prone to these disasters
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My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
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Aman Kumar Shrivastava
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Prisha Gupta
8thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
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Eshan Arora
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Barkha Arora
10thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
