The Nature of Earthquakes

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Earthquakes Introduction
7:31 — by George Berry

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Key Questions

  • Answer:

    The release of tension built up in Earth's crust.


    An earthquake occurs when energy is suddenly released in the earth's lithosphere: the surface of the earth shakes because of this energy. When this energy is released, it creates seismic waves.

    Earthquakes can occur anywhere within Earth's crust, but most commonly occur along active plate boundaries. Earthquakes that occur intraplate (within plates) are usually caused by the reactivation of very old fault systems. Earthquakes can even be caused by human activities such as nuclear testing.

    Diagram of intraplate earthquake occurrence:

    Diagram of plate boundary earthquake occurrence:

  • Answer:

    Along fault lines


    The tectonic plates are quite shifted along fault lines, and when they shift even more or slide past one another, an earthquake can form.

  • Tsunami is basically a flood from a sea. these are very high waves that hit the shore n left them devastaed. Now these waves are generated because of an earthquake which takes place at the bottom of the sea, hence, results in a tsunami.