Seismic Waves Characteristics

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Questions and Answers

What type of motion is exhibited by Love waves?

  • Circular motion
  • Vertical motion
  • Horizontal motion (correct)
  • Spiral motion

Which wave velocity lies between the S-wave velocity in the soil layer and the half-space?

  • P-wave velocity
  • Love wave velocity (correct)
  • Rayleigh wave velocity
  • Surface wave velocity

What term is used to describe the dependence of Love wave velocity on wavelength?

  • Reflection
  • Interference
  • Refraction
  • Dispersion (correct)

Why are Love waves considered dispersive?

<p>Because they can only propagate in a layered medium (D)</p> Signup and view all the answers

How are Love waves generated according to A.E.H. Love (1911)?

<p>By trapping S-waves in a soil layer (C)</p> Signup and view all the answers

What kind of waves are responsible for generating Love waves?

<p>Surface waves (C)</p> Signup and view all the answers

What is the direction of mass particle motion for a P-wave?

<p>In the direction of wave propagation (B)</p> Signup and view all the answers

Why are S-waves sometimes referred to as secondary waves?

<p>Because they move slower than P-waves (D)</p> Signup and view all the answers

Which of the following surface waves are subdivided into Rayleigh and Love waves?

<p>Surface waves (B)</p> Signup and view all the answers

How do S-waves affect the instantaneous volume of materials?

<p>No effect on volume (C)</p> Signup and view all the answers

Which wave type is responsible for causing a momentary shape change in materials?

<p>S-wave (B)</p> Signup and view all the answers

What type of waves do not propagate through fluids?

<p>S-waves (D)</p> Signup and view all the answers

What type of motion describes the particle motion in a homogeneous half-space?

<p>Retrograde ellipse in the vertical plane (B)</p> Signup and view all the answers

In a layered and dissipative medium, the path of particle motion is always:

<p>Elliptical (D)</p> Signup and view all the answers

What type of wave is dependent on Poisson's ratio and its velocity is approximately 0.9194 times that of S-wave in a Poisson's solid?

<p>Rayleigh wave (C)</p> Signup and view all the answers

Which scientist explained the mechanism of generation of Love waves in a horizontal soil layer overlying a half-space?

<p>A.E.H. Love (D)</p> Signup and view all the answers

When is the SH-wave trapped in the soil layer according to A.E.H. Love's explanation?

<p>When the angle of reflection at the base of soil layer is more than the critical angle (A)</p> Signup and view all the answers

What type of interference generates horizontally traveling Love waves according to A.E.H. Love's explanation?

<p>Constructive interference of reflected SH-waves from the top and bottom of the soil layer (C)</p> Signup and view all the answers

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