Weak anisotropy-attenuation parameters

0330515 - GFÚ 2010 RIV US eng J - Journal Article
Vavryčuk, Václav
Weak anisotropy-attenuation parameters.
Geophysics. Roč. 74, č. 5 (2009), WB203-WB213. ISSN 0016-8033. E-ISSN 1942-2156
R&D Projects: GA AV ČR IAA300120801
Grant - others:EC(XE) MTKI-CT-2004-517242
Institutional research plan: CEZ:AV0Z30120515
Keywords : weak anisotropy parameters * weak anisotropy-attenuation parameters * seismic waves
Subject RIV: DC - Siesmology, Volcanology, Earth Structure
Impact factor: 1.662, year: 2009

Velocity anisotropy and attenuation in weakly anisotropic and weakly attenuating structures can be treated uniformly using weak anisotropy-attenuation (WAA) parameters. The WAA parameters are constructed in away analogous to weak anisotropy (WA) parameters designed for weak elastic anisotropy. The WAA parameters generalize WA parameters by incorporating attenuation effects. They can be represented alternatively by one set of complex values or by two sets of real values. Assuming high-frequency waves and using the firstorder perturbation theory, all basic wave quantities such as the slowness vector, the polarization vector, propagation velocity, attenuation, and the quality factor are linear functions ofWAAparameters. Numerical modeling shows that perturbation equations have different accuracy for different wave quantities. The propagation velocity usually is calculated with high accuracy.
Permanent Link: http://hdl.handle.net/11104/0176290