Processing Magnetotelluric Data With Modern Statistical and Numerical Techniques

Katherine M. Edwards; Lynn M. Hastie

doi:10.1071/EG997043

ISSN: 0812-3985
E-ISSN: 1834-7533

Processing Magnetotelluric Data With Modern Statistical and Numerical Techniques
Authors Katherine M. Edwards^a and Lynn M. Hastie^b
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^a Physics Department, The University of Queensland, . Phone(07) 3365 3411, Facsimile(07) 3365 1242 ^b Physics Department, The University of Queensland, .
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 28, Issue 1-2, Mar 1997, p. 43 - 47
DOI: https://doi.org/10.1071/EG997043
- Published online: 01 Mar 1997

Abstract

Magnetotelluric impedances are estimated from electric and magnetic field data using a Kalman filtering method. Unlike most of the methods currently used in processing magnetotelluric data, this technique is a time-domain method which uses a linear, discrete-time filter to recursively obtain estimates of ground response. A three-step procedure is proposed, which allows the incorporation of remote reference data.

The Kalman filtering technique is applied to the "active interval" subset of the standard EMSLAB magnetotelluric dataset, and the results are found to be comparable with those from other commonly used analysis methods for magnetotelluric data.

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References

Chant, I.J. and Hastie, L.M., 1992, Time-frequency analysis of magnetotelluric data: Geophysical Journal International 111, 399-413.
Dekker, D.L. and Hastie L.M., 1981, Sources of error and bias in a magnetotelluric depth sounding of the Bowen Basin: Physics of the Earth and Planetary Interiors 25, 219-225
Hastie, L.M. and Edwards, K.M., 1995, Higher order spectra in the processing of magnetotelluric data: Exploration Geophysics 26,144-148.
Gamble, T.D., Goubau, W.M. and Clarke, J., 1979, Magnetotellurics with a remote magnetic reference: Geophysics 44, 53-68.
Haykin, S., 1990, Modern Filters: Macmillan Publishing Company, Sydney.
Jones, A.G., Chave, A.D., Egbert, G., Auld, D. and Bahr, K., 1989, A comparison of techniques for magnetotelluric response function estimation: Journal of Geophysical Research 94,14201-14213.
Sims, W.E., Bostick, F.X. and Smith, H.W., 1971, The estimation of magnetotelluric impedance tensor elements from measured data: Geophysics 36,938-942.
Spagnolini, U., 1994, Time-domain estimation of MT impedance tensor: Geophysics 59, 712-721.

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Article Type: Research Article

Keyword(s): Kalman filtering; Magnetotelluric; remote reference

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Processing Magnetotelluric Data With Modern Statistical and Numerical Techniques

Abstract

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