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Geography

Explain the three types of earthquake waves.

Earthquakes

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The three types of earthquake waves are-

  1. P or Primary wave — These are the first earthquake waves to be recorded on a seismogram of an earthquake. They are compressional,i.e., the particles vibrate in the direction of movement of the wave. They can pass through solids, liquids and gases.

  2. S or Secondary wave — These waves are recorded on a seismogram after the P waves. They are distortional waves in which the particles vibrate at right angles to the direction of movement of the wave. S waves travel through the earth's interior but cannot be transmitted by liquids.

  3. L or Surface waves — These waves travel along the surface of the earth and are recorded after the P and S waves. Two types of L waves are identified- Love waves and Rayleigh waves.

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