SBS42: P- wave Source

The borehole source SBS42 generates compressional waves (P) in water filled boreholes.  The seismic signals are highly repeatable.  Energy released by the IPG5000 discharges through a coaxial cable terminated by two adjacent spark electrodes.  The spark discharge vaporizes water by a high-pressure plasma.  This generates vapor bubbles which expand and collapse, thereby generating high-frequency seismic waves.