First-order reflection/transmission coefficients for unconverted plane P waves in weakly anisotropic media

0348409 - GFÚ 2011 RIV GB eng J - Článek v odborném periodiku
Farra, V. - Pšenčík, Ivan
First-order reflection/transmission coefficients for unconverted plane P waves in weakly anisotropic media.
Geophysical Journal International. Roč. 183, č. 3 (2010), s. 1443-1454. ISSN 0956-540X. E-ISSN 1365-246X
Grant CEP: GA ČR GA205/08/0332
Výzkumný záměr: CEZ:AV0Z30120515
Klíčová slova: body waves * seismic anisotropy * wave propagation
Kód oboru RIV: DC - Seismologie, vulkanologie a struktura Země
Impakt faktor: 2.411, rok: 2010

We present approximate formulae for the plane-wave displacement reflection/transmission (R/T) coefficients for interfaces of arbitrary contrast, separating two homogeneous, weakly anisotropic media. They result from boundary conditions requiring continuity of displacement vector and traction, in which coupled S waves are considered as a single S wave and exact quantities are replaced by first-order quantities used in first-order ray tracing. Specifically, the phase velocities, slowness and polarization vectors of P and coupled S waves appearing in the boundary conditions are of the first-order with respect to the deviations of anisotropy from isotropy. Application of the derived R/T coefficients transforms the amplitude of an incident P wave into amplitudes of reflected/transmitted P or coupled S waves.
Trvalý link: http://hdl.handle.net/11104/0188956