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Magnetotelluric modeling considering vertical transversely isotropic electrical anisotropy
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  • Journal title : Geophysics and Geophysical Exploration
  • Volume 18, Issue 4,  2015, pp.232-240
  • Publisher : Korean Society of Earth and Exploration Geophysicists
  • DOI : 10.7582/GGE.2015.18.4.232
 Title & Authors
Magnetotelluric modeling considering vertical transversely isotropic electrical anisotropy
Kim, Bitnarae; Nam, Myung Jin;
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Magnetotelluric (MT) survey investigates electrical structure of subsurface by measuring natural electromagnetic fields on the earth surface. For the accurate interpretation of MT data, the precise three-dimensional (3-D) modeling algorithm is prerequisite. Since MT responses are affected by electrical anisotropy of medium, the modeling algorithm has to incorporate the electrical anisotropy especially when analyzing time-lapse MT data sets, for monitoring engineered geothermal system (EGS) reservoir, because changes in different-vintage MT-data sets are small. This study developed a MT modeling algorithm for the simulation MT responses in the presence of electrical anisotropy by improving a pre-existing staggered-grid finite-difference MT modeling algorithm. After verifying the developed algorithm, we analyzed the effect of vertical transversely isotropic (VTI) anisotropy on MT responses. In addition, we are planning to extend the applicability of the developed algorithm which can simulate not only the horizontal transversely isotropic (HTI) anisotropy, but also the tiled transversely isotropic (TTI) anisotropy.
electrical anisotropy;MT;monitoring;engineered geothermal system (EGS);
 Cited by
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