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Acoustic/Acoustic reflection explosive source with critical angle

Animations - Reflection Let us now consider a heterogeneous model consisting of two infinitely homogeneous and isotropic media, separated by a horizontal surface. This model is also known as a ``two half-space model,'' where each homogeneous medium represents a half-space. Assume that an explosive source generates P-waves which radiate through the top half-space. When these waves reach the interface between the half-spaces, part of their energy returns to the half-space from which it came. This is called reflection. The remaining energy enters the second medium. This is called transmission. The phenomena of reflection and transmission is described by these series of animations.

Here we have two acoustic half-spaces and an explosive source. We can notice the critical angle.

Acoustic/acoustic reflection explosive source without critical angle

Animations - Reflection Acoustic/acoustic reflection explosive source without critical angle.

Acoustic/Acoustic reflection explosive source with critical angle

Animations - Reflection Here we have two acoustic half-spaces and an explosive source. We can notice that the critical angle occurs early compared to the previous animation.

Water/solid interface

Animations - Reflection Fluid/solid interface. Notice the creation of P-S transmitted waves in addition to P-P transmitted waves.

Acoustic/solid interface

Animations - Reflection Fluid/solid interface. Notice the creation of head-waves.

Solid/solid interface

Animations - Reflection Solid/solid interface. An illustration of variation P-P, P-S, S-P, and S-S reflection with angle. The source here is a horizontal force.

Solid/solid interface

Animations - Reflection

Acoustic/acoustic interfaces

Animations - Reflection Amplitude variation with angle and free surface reflection.

Acoustic/solid interfaces and acoustic/acoustic free surface

Animations - Reflection Amplitude variation with angle and free surface reflection.

Primaries, free-surface multiples and internal multiples in a towed-streamer configuration

Animations - Reflection Two fluid/fluid diping interfaces. We illustrate the construction of internal multiples.