What is the fine-grained topic of the following text: The seismic radial anisotropy models were obtained at two sites from dispersion analyses of the Rayleigh waves, with vertical polarization, and Love waves, with horizontal polarization, using the Multichannel Analysis of Surface Waves (MASW) method. Only return the topic.
Seismic radial anisotropy analysis using the Multichannel Analysis of Surface Waves method.