Fig. 7
Spike resolution tests for Rayleigh wave group velocity maps (a,c) and Love wave group velocity maps (b,d) in 0.5 s and 5.0 s periods. Rayleigh wave group velocity maps (e,g) and Love wave group velocity maps (f,h) calculated from ZZ and TT cross-correlations respectively in 0.5 s and 5.0 s periods. The bins with less than three station-pair are masked. The map has been overlayed on the topography of the Koyna–Warna region67. A common color scale has been used for both Rayleigh and Love wave group velocities at each period. The outline of the Koyna and Warna rivers as well as their respective reservoirs are also overlayed on the map (black). The stations used are shown in red triangles in each sub-figure. The maps in this figure were generated using Python-v3.8.18 scripts with MSNoise-v1.3, MSNoise-Tomo44, GMT-668, and pygmt-v0.911, and combined using Inkscape-v1.2.212, please see Data Availability section for more details.
