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  3. fig 2 consider a vertically incoming incident p wave striking...

Question: fig 2 consider a vertically incoming incident p wave striking...

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Fig. 2 Consider a vertically incoming (incident) P wave striking a horizontally stratified earth (Fig. 2). The amplitude of the transmitted P-wave at the top boundary of layer1 is 1 (dont worry 4. Vertically incident P-wave ( 0 at units for amplitude). What is the amplitude of the P wave reflected from the boundary between layers 3 and 4? What is the amplitude of ayor 1 10 m wave transmitted into layer 4? What are the 2 km/s; ρ = 2.50 g/cm, -3 km/s: p, 2.65 g/cm amplitudes of the corresponding S-waves? Express amplitudes in relative terms (relative to the amplitude of the transmitted P-wave at the top boundary of layer 1). Take into account amplitude decrease due to spherical spreading. Assume that there is no absorption (no amplitude attenuation due to conversion of elastic energy into heat) 5 m tayer 3 20 m 5. a) A set of seismic shot gathers is given in Fig. 3 g/cm What types of wave arrivals can you identify? What is the velocity of the first arriving energy? (Assume that the receiver-spread length used to record the data was 2600 m.) Can you guess where were the data collected, on land or at sea? layor 4 2600 m Fig.3 1 3

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