Seismic Waves An introduction


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Seismic Waves


What is an Earthquake?

  • Instrumentally recorded (or felt) ground shaking, normally a result of underground movement on a fault





Types of Seismic Wave



Body Waves



Particle motion of body waves



Surface Waves

    • Form at the free surface
    • Amplitude decays exponentially with depth.




Wave Period and Wavelength 





Other phases



Ray theory

  • Seismic waves can be represented as rays











Propagation of Seismic Waves In the Earth; M. Wysession



















Amplitude and Intensity










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