SERVICES

Seismic Reflection Survey

Shallow seismic reflection survey are used for delineation of near-surface geology for engineering studies and coal and mineral exploration within depth of up to 1km. Seismic energy pulses are reflected from subsurface interfaces  and recorded at near-normal incidence at the surface. The travel times are measured and can be converted into estimates of depth to […]

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Ground Magnetic Survey

Magnetic surveys measure the magnitude and orientation of the Earth’s magnetic field. Magnetic field at Earth’s surface depends on field generated in Earth’s core, magnetic mineral content of surface materials and remnant magnetisation of surface rocks. Ground magnetic survey mainly used to investigate subsurface geology on the basis of anomalies in the Earth’s magnetic field […]

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MASW (Surface Wave Survey)

Multi-channel Analysis of Surface Waves (MASW) is a very useful method for investigating shallow geological structure and the relative shear strength of subsurface materials. MASW is a fast method of evaluating near-surface profile because the entire range of investigation depth is covered by one or a few generation of ground roll without changing receiver configuration. […]

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Seismic Refraction Survey

Seismic refraction method uses the process of critical refraction to determine the depth and dip of layer boundaries as well as the velocity of layers. Seismic refraction is useful geophysical method for investigating geological structure and rock properties. The velocity of sound travelling through the sub-surface varies with material composition and compaction. Seismic energy transmitted […]

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Induced Polarization (IP)

Induced Polarization is a phenomenon where the potential difference did not drop instantaneously to zero when the current was turned off. Instead, the potential difference dropped sharply at first, then gradually decayed to zero after a given interval of time. This phenomenon is called induced polarization effect or I.P effect. In 1950’s onwards, induced polarization […]

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Electrical Resistivity Imaging

Electrical Resistivity Imaging (ERI) also known as resistivity survey is one of a number of methods used in geophysics. Electrical resistivity imaging is one of the versatile method in ground investigation especially in engineering and environmental geophysics. The electrical resistivity technique is a useful method for characterising the subsurface materials in term of their electrical […]

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