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Application of Two-Dimensional Boundary Condition to Three-Dimensional Magnetotelluric Modeling  

Han, Nu-Ree (Department of Energy Systems Engineering, Seoul National University)
Nam, Myung-Jin (Department of Petroleum and Geosystems Engineering, The University of Texas at Austin)
Kim, Hee-Joon (Department of Energy Resources Engineering, Pukyong National Universiy)
Lee, Tae-Jong (Geological Research Division, Korea Institute of Geoscience and Mineral Resources)
Song, Yoon-Ho (Geological Research Division, Korea Institute of Geoscience and Mineral Resources)
Suh, Jung-Hee (Formerly Department of Civil, Urban and Geosystem Engineering, Seoul National University)
Publication Information
Geophysics and Geophysical Exploration / v.11, no.4, 2008 , pp. 318-325 More about this Journal
Abstract
Assigning an exact boundary condition is of great importance in three-dimensional (3D) magnetotelluric (MT) modeling, in which no source is considered in a computing domain. This paper presents a 3D MT modeling algorithm utilizing a Dirichlet condition for a 2D host. To compute boundary values for a model with a 2D host, we need to conduct additional 2D MT modeling. The 2D modeling consists of transverse magnetic and electric modes, which are determined from the relationship between the polarization of plane wave and the strike direction of the 2D structure. Since the 3D MT modeling algorithm solves Maxwell's equations for electric fields using the finite difference method with a staggered grid that defines electric fields along cell edges, electric fields are calculated at the same place in the 2D modeling. The algorithm developed in this study can produce reliable MT responses for a 3D model with a 2D host.
Keywords
3D; MT; modeling; boundary condition;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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