An adaptation of a method of viscoacoustic inversion developed by Ribodetti et al. (2000) is applied to the power law attenuation model. The model is used in inversion of real data from different acquisition geometries, which removes the restriction to the circular acquisition of the previous work of Ribodetti et al. (2000). We present an application of 2.5-D asymptotic viscoacoustic inversion to ultrasonic waves scattered by a lava cylinder immersed in water. It is demonstrated that the rheological parameters (velocity, attenuation and a related to the frequency dependence of the relaxation functions) of rock samples can be determined by this method.
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