Exploration Geophysics

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4 domain-specific abstractions whose origin domain is Exploration Geophysics.

• First break picking — Detection of the earliest coherent seismic arrival time on each recorded trace for near-surface velocity and timing analysis.
• Plus–minus method — A reciprocal seismic-refraction analysis that combines travel times from opposite shot points to estimate refractor depth and velocity.
• Stacking velocity — The effective seismic velocity that best fits a hyperbolic normal-moveout curve to reflection travel times across offsets in a common-midpoint gather.
• Vertical electrical sounding — A surface geophysical method that varies electrode spacing and measures apparent resistivity to infer one-dimensional changes in subsurface electrical properties with depth.