Page 1 - Lesson notes- Earthquake and causes
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SAI INTERNTIONAL SCHOOL
                                                          Class 8
                                                      Lesson Notes
                                                    Subject- Physics
                                           Ch- Some Natural Phenomena
                                        Subtopic- Earthquake and Causes

             Earthquakes: Sudden shaking or trembling of earth’s surface caused by disturbance deep
             inside the Earth’s crust is called earthquake.
             Causes of earthquake:
                 1.  Movement  of  tectonic  plates  is  the  main  cause  of  an  earthquake.  Two  types  of
                     earthquake causing tectonic plates movement is possible.
                        a.  Brushing past
                        b.  Colliding













                 2.  Volcanic eruption
                 3.  Meteorite Strike
                 4.  Nuclear explosion

             Fault zones in India:
                        1.  Western and central Himalayas
                        2.  Whole North-East region
                        3.  Rann of kutch
                        4.  Rajasthan
                        5.  Indo-Gangetic Plane.
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