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http://dx.doi.org/10.5467/JKESS.2009.30.7.834

An Application of Minimum Support Stabilizer as a Model Constraint in Magnetotelluric 2D Inversion  

Lee, Seong-Kon (Geothermal Research Division, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Journal of the Korean earth science society / v.30, no.7, 2009 , pp. 834-844 More about this Journal
Abstract
Two-dimensional magnetotelluric (MT) inversion algorithm using minimum support (MS) stabilizer functional was implemented in this study to enhance the contrast of inverted images. For this implementation, this study derived a formula in discrete form for creeping model updates in the least-squares linearized inversion. A spatially varying regularization parameter determination algorithm, which is known as ACB (Active Constraint Balancing), was also adopted to stabilize the inversion process when using MS stabilizer as a model constraint. Inversion experiments for a simple isolated body model show well the feature of MS stabilizer in concentrating the anomalous body compared with the second-order derivative model constraint. This study also compared MS stabilizer and the second-order derivative model constraints for a model having multiple anomalous bodies to show the applicability of the algorithm into field data.
Keywords
magnetotelluric; 2D inversion; minimum support; ACB; smoothness model constraint;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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