The purpose of this investigation was to undertake a 1st Phase passive (blind test) seismic survey in Assam area in order to examine if the natural seismicity in the area is sufficient enough to provide a 3D Vp and Vp/Vs subsurface model via passive tomography (PST) and provide a course velocity and Vp/Vs model after 3 months of recording. The designed network spanned an area of 1900km2

Passive seismic case study

The obtained Vp/Vs values < 1.7 for the entire block are presented in the figure below

Passive seismic case study

Even though the network was operating for only 3 months the correlation of the PST data with the prevailing geological structures of the region was astonishing.

Passive seismic case study

Many other case histories can be shown to the potential clients upon request.