Fig. 2
Isotropic shear wave velocity anomalies in lateral sections (a–d) from surface down to 5 km depth. The white contours are plotted at every 2.5 % \(V_s\) anomaly. The outline of the Koyna, Warna, and Morana rivers as well as respective associated reservoirs are shown (black). The western ghats escarpment is shown with a ridged line. The stations are shown as red triangles in (a). The seismicity within 0.5 km depth of each lateral section is shown by green solid circles. Focal mechanisms of large earthquakes (\(M_w\) > 5)4,5,6,8 within 0.5 km depth of the lateral sections are also shown using beach balls. The locations of the cored borehole KBH1 and the pilot deep borehole KFD1 are shown with hollow circle and star respectively and the dashed black line marks the Donichawadi fissure same as in Fig. 1. The maps in this figure were generated using Python-v3.8.18 scripts with MSNoise-v1.3 and MSNoise-Tomo44, swprepost-v2.0.045, Geopsy-v3.4.046, and pygmt-v0.911, and combined using Inkscape-v1.2.212, please see Data Availability section for more details.
