Fundamental mode Rayleigh wave group velocity dispersion data

Fundamental-mode Rayleigh-wave group-velocity dispersion curves have been
computed from 14706 regional waveforms (ray-paths) sampling India,
Himalaya, Tibet and surrounding regions. These have been combined through
ray-based travel-time tomography to compute 2D group-velocity maps at
periods between 10 and 120~s. These ray-paths sample the region with
unprecedented density and uniformity. The 2D maps have a lateral
resolution of 3\deg x3\deg, comparable to the regional geology. The
dispersion curves, at each 1\deg\ spaced node-points, are inverted to
obtain a 3D isotropic shear-wave velocity structure.