1D & 2D Interpretation of The Magnetotelluric data for Detecting Geological Subsurface Structures along an E-W profile in Arak

Reflection and refraction of EM signals at both horizontal and vertical interfaces separate media of different electrical parameters, geoelectromagnetic methods have been developed and employed to recognize the geological features and particularly fault zones in many regions. To achieve higher lateral resolution and also greater depth penetration, the MT method is one of the most effective electromagnetic techniques to imagine the subsurface structures electrically. In 2006 wide frequency range of magnetotelluric measurements were carried out at the eastern part of the city of Arak in Iran to understand the crustal electrical conductivity of the region by putting emphasis on locating the fault zones. The electric and magnetic field components were acquired along a profile across the geological trend at 15 stations. A robust single site processing followed by the inversion and one dimensional as well as two dimensional modeling was performed. The inversion results revealed electrical