BIS-SH S-Wave Source

The borehole source BIS-SH generates horizontally polarized shear waves (SH) and compressional waves (P). The seismic signals are highly repeatable. The source works in dry or water-filled boreholes and can be used in vertical or horizontal boreholes.
The energy released by the IPG5000 discharges through a system of electromagnetic coils adjacent to a copper plate. If the plate is rejected a mechanical impact to the borehole wall is generated. The borehole source is coupled to the borehole wall by a pneumatic clamping system (inflatable bladder). The orientation of the source is controlled from the surface by a torsionally stiff hose.