Publication: Numerical accuracy of magnetotelluric modeling: A comparison of finite difference approximations
Issued Date
2002-01-01
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ISSN
18805981
13438832
13438832
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2-s2.0-1842504753
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Mahidol University
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SCOPUS
Bibliographic Citation
Earth, Planets and Space. Vol.54, No.6 (2002), 721-725
Suggested Citation
Weerachai Siripunvaraporn, Gary Egbert, Yongwimon Lenbury Numerical accuracy of magnetotelluric modeling: A comparison of finite difference approximations. Earth, Planets and Space. Vol.54, No.6 (2002), 721-725. doi:10.1186/BF03351724 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/20157
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Title
Numerical accuracy of magnetotelluric modeling: A comparison of finite difference approximations
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Abstract
To solve for the induced electromagnetic fields in a conductive medium the quasi-static Maxwell's equations may be reduced to a second order elliptic system, formulated in terms of either the electric or magnetic vector fields. We show with 1-D and 3-D numerical experiments that solutions obtained from equations formulated in terms of the electric fields are less sensitive to grid resolution than those obtained from the magnetic formulation. On a fine enough mesh, solutions from both approaches are nearly identical, while on coarser meshes solutions form the electric field formulation tend to be closer to exact solutions (where available), or fully converged fine mesh solutions. Copyright © The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences.