Magnetotelluric Modelling and Inversion For Earthquake Studies in Taiwan

C. S. Chen; F Hsieh; D Zuo; J Li; Lin Lin; G Xie

doi:10.1071/ASEG2003_3DEMab003

ISSN: 2202-0586
E-ISSN:

oa Magnetotelluric Modelling and Inversion For Earthquake Studies in Taiwan
Authors C. S. Chen^a, F Hsieh^b, D Zuo^c, J Li^d, Lin Lin^e and G Xie^d
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^a National Central University Taiwan ^b Stanford University USA ^c Wuhan Uni., china ^d GLGEO Berkeley, USA ^e NHIT Taiwn
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2003, Issue 3D Electromagnetics, Apr 2003, p. 1 - 5
DOI: https://doi.org/10.1071/ASEG2003_3DEMab003
- Published online: 01 Apr 2003

Abstract

In this paper, we present a magnetotelluric (MT) modelling and inversion method for geophysical exploration using the Global Integral Local Differential (GILD) algorithm. We first describe GILD electromagnetic modelling and inversion algorithm and then apply it to interpret MT data from the Chi-Chi earthquake source area in Taiwan. In the resistivity image computed from the GILD algorithm, the Chelungpu (CLP) fault and the associated structures appear more clearly than those of the previous 1-D results.

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References

Chen, C.S. and Chen, C.C., 2002, Deep electromagnetic images of the seismogenic zone in the Chi-Chi (Taiwan) earthquake: Journal of the Chinese Institute of Engineers, 25, 483-490.
Constable, S.C, Parker, R.L. and Constable, C.G, 1987, Occam’s inversion, a practical algorithm for generating smooth models from electromagnetic sounding data: Geophysics, 52, 289-300.
Hohmann, G.W., 1975, Three-dimensional induced polarization and electromagnetic modelling: Geophysics, 40, 300-324.
Ingham, M., 1988, The use of invariant impedances in magnetotelluric interpretation: Geophys. J., 92, 165-169.
Li J. and Xie, G., 1999, A 3-D cubic-hole element and its application in resistivity imaging: three Dimensional Electromagnetics, Michael Oristaglio and Brian Spies, eds., Geophysical Developments of SEG BOOK, 7, 591-599.
Ma, K.F., Lee, C.T., Tsai, Y.B., and Shin, T.C., 1999, The Chi-Chi, Taiwan earthquake: large surface displacements on an island thrust fault: EOS, 80(50), 605-611.
Oristaglio, M., and Spies B., 1999, Three Dimensional Electromagnetics. Geophysical Developments of SEG BOOK.
Xie, G. and Li, J., 1999, A new algorithm for 3-D nonlinear electromagnetic inversion: Three-Dimensional Electromagnetics, Michael Oristaglio and Brian Spies, eds. SEGBOOK, 7, 193-207.
Xie, G., Li, J., Majer, E., Zuo, D. and Oristaglio, M., 2000, New 3D electromagnetic modeling and inversion: Geophysics, 65, 804-822.
Xie , G., Li, J, and Majer, Ernest, 1998, New 3D parallel SGILD modeling and nonlinear inversion for geophysical and hydrological coupled high resolution imaging. Proceedings of the 4-th SEGJ international symposium (December of 1998 in Tokyo), 253-259.
Xie, G., Li, J., Majer, E., Zuo, D. and Oristaglio, M., 2000, New 3D electromagnetic modeling and inversion: Geophysics, 65, 804-822.
Yu, S.B, Chen, H.Y and Kuo, L.C., 1997, Velocity field of GPS stations in the Taiwan area: Tectonophysics, 274, 41-59.

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Article Type: Research Article

Keyword(s): CLP; earthquake; GILD; MT modelling and inversion; resistivity imaging

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