Helicopter-borne frequency-domain electromagnetic (HEM) surveys are used extensively for mineral and groundwater exploration and a number of environmental investigations. To have a meaningful interpretation of the measured multi- frequency HEM data, in addition to the resistivity maps which are provided in each frequency or for some particular depth levels, it is a necessity ...

Apparent resistivity data from the Offset-Wenner array (Zemun, Serbia), square (Bogatić and Golubac, Serbia) Wenner tri-potential technique (Vrdnik, were used to detect, measure, reduce lateral effects in 1D inversion. Forward inverse modelling with α, β γ arrays determined that provided most accurate estimate of first-and second-layer resistivity, while high substratum. The survey on Zemun loe...

Koyna region is well-known for its triggered seismic activities since the hazardous earthquake of M = 6.3 occurred around the Koyna reservoir on 10 December 1967. Understanding the shallow distribution of resistivity pattern in such a seismically critical area is vital for mapping faults, fractures and lineaments. However, deducing true resistivity distribution from the apparent resistivity dat...

Calculated parameters (soil layer resistivity, soil thickness, and the number of layers) horizontally layered are usually obtained based on measured apparent resistivity under different measurement distances, which significant for design, operation, maintenance grounding grids. Most existing calculation methods just trying to make results approach data, ignoring relationship among calculated pa...

Pertamina has conducted geothermal exploration in Sumatra showing that the depths to the top of most of the geothermal reservoirs are about 1000-2000 meters. Previous geophysical exploration work by Pertamina emphasized the use of DC-resistivity methods such as the Schlumberger method. However, these techmques can typically only penetrate to a depth of less than 1000 meters and are too shallow ...