sparker
sparker A seismic source created by the rapid formation of a gas-plasma bubble from the ionization of sea water after the discharge of a high-voltage spark from a comb of electrodes contained within a frame. It provides good resolution (1–2 m) with limited depth penetration (less than 100 m).
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Since ancient times, use of poison has been considered treacherous and, therefore, incompatible with honorable conduct in war. Yet, the history o…
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sparker