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The Place of Geophysics in Oil and Mineral Exploration
How Seismic Waves Propagate
Seismic Recording Instruments
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amplitude angle anomaly applied axis basement body buried component contours correction corresponding curve deconvolution density depth detector determined direction distance earth earth,s field earth,s surface effect electrodes energy exploration FIGURE filter formations Fourier frequency function geological geophone Geophysics gravimeter gravity anomaly gravity meters horizontal illustrates indicated input instruments interface interpretation interval layer lithology located magnetic field magnetometer magnetotelluric material measured method mgal milligals noise observed obtained operations output perpendicular plane plotted position potential processing prospecting pulse range record sections reflection records refraction residual resistivity rocks salt dome sampling sand sedimentary seismic reflection seismic signals seismic waves shooting shot point shown in Fig shows slab sonobuoy square wave station structure subsurface surveys techniques thickness time-distance tion trace transform variation velocity vertical Vibroseis waveform wavefront wavelength Western Geophysical zero