Swiss Journal of Geosciences

Table 1 Anisotropic characteristics of the shaly and carbonate-rich sandy (crs) facies

From: Seismic anisotropy of Opalinus Clay: tomographic investigations using the infrastructure of an underground rock laboratory (URL)

Facies type	\(v_P^\perp\) [km/s]	\(v_P^\parallel\) [km/s]	\({\overline{v}}_P\) [km/s]	AvP [%]	\(\Theta\) [\(^{\circ }\)]	\(v_S^ \perp\) [km/s]	\(v_S^\parallel\) [km/s]	\({\overline{v}}_S\) [km/s]	AvS [%]	\(\Theta\) [\(^{\circ }\)]
shaly	2.551	3.217	2.884	23	63	1.074	1.477	1.276	32	59
crs	3.271	4.004	3.638	20	51	1.524	2.054	1.789	30	59

Velocities and angle were estimated by fitting an ellipse to the P- and S-wave data (Fig. 4), whereas the seismic velocity anisotropies AvP and AvS were determined according to Eq. (1). The orientation is related to the bedding strike

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