한국지구물리탐사학회:학술대회논문집
- 한국지구물리탐사학회 2007년도 공동학술대회 논문집
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- Pages.261-266
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- 2007
An efficient 3D inversion of magnetotelluric data
- Han, Nu-Ree (Dept. of Civil, Urban and Geosystem Eng., Seoul National University) ;
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Choi, Ji-Hyang
(Dept. of Civil, Urban and Geosystem Eng., Seoul National University)
;
- Nam, Myung-Jin (Dept. of Petroleum and Geosystems Eng., The University of Texas at Austin) ;
- Kim, Hee-Joon (Dept. of Environmental Exploration Eng., Pukyung National University) ;
- Lee, Tae-Jong (Groundwater & Geothermal Resources Div., KIGAM) ;
- Song, Yoon-Ho (Groundwater & Geothermal Resources Div., KIGAM) ;
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Suh, Jung-Hee
(Deceased, Formerly Dept. of Civil, Urban and Geosystem Eng., Seoul National University)
- 발행 : 2007.06.07
초록
An efficient three-dimensional (3D) inversion of magnetotelluric (MT) data can be carried out by using approximate sensitivities or avoiding the calculation of a full sensitivity matrix. In this paper, we propose approximate sensitivities for efficient 3D MT inversion based on the Gauss-Newton method and test and compare four kinds of sensitivities. Applying the four sensitivities to both synthetic and field data shows that the effects of sensitivities are highly dependent on data and thus applying various combinations of sensitivities is recommended for efficient inversion and good images.