This handy pocket-sized field guide provides practical information and assistance to anyone engaged in small-scale surveys on the ground. Fully revised and updated throughout, the Fourth Edition includes comprehensive updates on the use of GPR and GPS and new sections on surface wave seismics and towed array systems. This has become the standard text in this area for use in the field and the experience of the two authors will ensure the book retains its place as one of the most popular handbooks in applied geophysics.
Additional material available on the companion website at www.wiley.com/go/milsom/geophysics4e
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accuracy amplitude angles anomaly antennas apparent resistivity approximately attenuation base stations Bouguer Bouguer plate cable capacitive coupling coil common conductivity conductors constant contours corrections CSAMT current flow data loggers decay density depth of investigation detected detectors dipole dipole-dipole dipping distance diurnal Earth effects electrical electrodes electromagnetic energy equal equation errors factor ﬁeld frequency geological geophone geophysical gradient gravity meters ground horizontal induction instruments interface interpretation inverse-square law layer lines loop magnetic field magnetometers magnetotelluric measured methods metres mGal nanotesla noise observed obtained penetration permittivity phase plot polarisation position produce profiles proton radar radiation radioactive range ratio Rayleigh wave readings receiver recorded reflection surveys refraction refractor rock S-waves satellites Schlumberger Section seismic sensor separation shot shot-point shown in Figure signal skin depth subsurface surface waves target topographic transmitter traverse usually values variations velocity vertical voltage wavelength