1) Earth study related 2) Geology 
prospecting techniques which measure the physical properties (magnetism, conductivity, density, etc) of rocks and define anomalies for further testing and the measurement of the earth`s physical properties to explore and delineate hydrocarbons, including electrical, seismic, gravity, magnetics, but not including drilling;
[adj] - of or concerned with geophysics
geophysical Of or concerned with geophysics; for example, 'Geophysical sciences.'
adjective of or concerned with geophysics; `geophysical sciences`