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Study on the magnetotelluric strike direction estimate
Author(s) -
LI Dewei,
YU Nian,
WANG Xuben,
CHEN Xiating,
LIU Yong
Publication year - 2019
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.14089
Subject(s) - magnetotellurics , geology , seismology , geodesy , electrical engineering , engineering , electrical resistivity and conductivity
The strike direction is an important parameter in magnetotelluric (MT) data processing, and the change of strike with depth may be associated with different structures and processes in the crust and mantle (Marquis et al.,1995). Phase tensor decomposition (Caldwell et al, 2004) and GB decomposition (Groom & Bailey, 1989) are the two most frequently used methods to estimate strike from MT impedance tensor. However, the strike direction estimated from the two methods is unstable in the presence of noise, and Muñíz et al. (2017) proposed a method based on phase tensor decomposition to estimate the stable strike of impedance tensor in the presence of noise under the assumption that the strike is continuous with frequency. We have studied this method and applied a similar strategy to obtain a stable strike.