| http://www.w3.org/ns/prov#value | - Similarly, EM sensors, such as explained above with reference to FIG. 5, may be affixed to cables towed in the water by the vessel (10 in FIG. 3A), also as explained with reference to FIG. 3D. Thus, substantially contemporaneous seismic data, electroseismic data, seismoelectric data and transient electromagnetic data can be acquired over a large area of the Earth's subsurface relatively efficientl
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