15 May 2017
Sonic technique is an acoustic exploration, and analyzes the propagation of the signal inside the material with frequencies up to 20 kHz. The method uses higher […]
15 May 2017
The Deviation Probe is used to measure the borehole deviation. A three-axis magnetometer measures the azimuthal direction of the borehole and a dual tilt sensor provides […]
15 May 2017
Gravimetry is a geophysical technique in which the Earth gravitational attraction is observed and interpreted in terms of mass distribution over space/time. In principle any process […]
15 May 2017
Magnetometry measures in an area the perturbations of the magnetic field caused by contrasts in magnetic susceptibility (where susceptibility is the ability of a substance to […]
15 May 2017
Magnetotellurics Magnetotellurics (MT) refers to a technique in which electrical resistivity is determined by doing measurements of electric and magnetic fields related to naturally occurring currents […]
15 May 2017
Thermal resistivity testing measures the capacity of the ground to conduct or dissipate heat. An accurate knowledge of the thermal properties of a soil (natural or […]
15 May 2017
The Ground Penetrating Radar (GPR) is a non-invasive method used in geophysics to investigate the most superficial part of the subsoil. The technique is based on […]
15 May 2017
When a current is passed through earth materials not enclosing metallic minerals, the amount of current is related to the driving potential only by the electric […]
15 May 2017
Geoelectrical tomography can be considered the principal method in geo-electrical measurements. This technique combines recent techniques of data acquisition with accomplishment interpretation solutions. The data acquisition […]
15 May 2017
Geoelectrical profiling is used when we necessity to study superficial depth ground properties but on long distances. It is applied in defining soil contamination, defining depth […]
15 May 2017
Downhole Seismic Testing This technique measures vertical changes in seismic velocity by placing a source at the top of a borehole and measuring travel-times at multiple […]
15 May 2017
Knowledge about rocks characteristics beyond the excavation face of tunnels or beneath the bottom hole of a well has always been part of underground engineering and […]
15 May 2017
Different techniques (except HVSR method) generally acquire and analyze surface waves in different ways. However, the ultimate aim of the diverse techniques is to determine the […]
15 May 2017
For the evaluation of the physical and mechanical characteristics of the rocks an analysis of the seismic data in terms of anelastic attenuation is performed. Factors […]
15 May 2017
Hybrid seismic technic is a geophysical survey that combines information obtained from seismic refraction and seismic reflection methods. In particular, the velocity model obtained through seismic […]