Behaviour of rays at interfaces in anisotropic viscoelastic media

0348406 - GFÚ 2011 RIV GB eng J - Journal Article
Vavryčuk, Václav
Behaviour of rays at interfaces in anisotropic viscoelastic media.
Geophysical Journal International. Roč. 181, č. 3 (2010), s. 1665-1677. ISSN 0956-540X. E-ISSN 1365-246X
R&D Projects: GA AV ČR IAA300120801
Institutional research plan: CEZ:AV0Z30120515
Keywords : seismic anisotropy * seismic attenuation * wave propagation
Subject RIV: DC - Siesmology, Volcanology, Earth Structure
Impact factor: 2.411, year: 2010

The behaviour of rays at interfaces in anisotropic viscoelastic media is studied using three different approaches: the real elastic ray theory, the real viscoelastic ray theory and the complex ray theory. In solving the complex eikonal equation, the highest accuracy is achieved by the complex ray theory. The real elastic and viscoelastic ray theories are less accurate but computationally more effective. In all three approaches, the rays obey Snell's law at the interface, but its form is different for each approach. The complex Snell's law constrains the complex tangential components of the slowness vector. The real viscoelastic and elastic Snell's laws constrain the real tangential components of the slowness vector. In the viscoelastic ray theory, the Snell's law is supplemented by the condition of the stationary slowness vector of scattered waves.
Permanent Link: http://hdl.handle.net/11104/0188953