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Earthquake Waves

Posted on : 04 Jan 2020

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  • Earthquake waves are basically of two types – body waves and surface waves.
  • Body waves are generated due to the release of energy at the focus and moves in all directions traveling through the body of the earth. They travel only through the interior of the earth. Body waves are faster than surface waves and hence they are the first to be detected on a seismograph. There are two types of body waves as primary waves and secondary waves.
  • Surface Waves: When the body waves interact with surface rocks, a new set of waves is generated called as surface waves. These waves move along the earth surface. Surface waves are also transverse waves in which particle movement is perpendicular to the wave propagation. Hence, they create crests and troughs in the material through which they pass.
  • Surface waves are considered to be the most damaging waves. Two common surface waves are Love waves and Rayleigh waves.

Article Related Questions

  1. With reference to the Earthquake waves, consider the following statements
    1.Body waves are faster than surface waves.
    2.Surface waves are considered to be the most damaging waves.
    3.Surface waves are generated when body waves interact with surface rocks.
    Which of the above statements is/are correct?

  2. 1.1 and 2 only

    2.2 only

    3.1 and 3 only

    4.1, 2 and 3

    Right Ans : 1, 2 and 3

  3. The 1857 Uprising was the culmination of the recurrent big and small local rebellions that occured in the preceding hundred years of British Rule. Elucidate (Answer in 150 words) - 2019 Mains

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