Advances in Electromagnetic Geophysical Exploration

Editorial

05 January 2024

Editorial: Advances in electromagnetic geophysical exploration

Jin Li

James Gong

Cong Zhou

and

Xian Zhang

2,006 views

0 citations

Editors

Jin Li

Hunan Normal University

James Gong

Deakin University

Cong Zhou

East China University of Technology

Impact

Schematic diagram of Euler rotation (Pek and Santos, 2002).

Original Research

18 October 2023

A rapid 3D magnetotelluric forward approach for arbitrary anisotropic conductivities in the Fourier domain

Yuzhen Zhu

, 2 more and

Wenyan Zhang

1,292 views

0 citations

Comparison chart of amplitude spectrum before and after processing. (A)1/8 truncation: The red line is the original spectrum, and the blue line is the processed spectrum. (B) 2/8 truncation: The red line is the original spectrum, and the blue line is the processed spectrum. (C) 3/8 truncation: The red line is the original spectrum, and the blue line is the processed spectrum.

Methods

18 October 2023

Data processing method for magnetotelluric sounding based on cepstral analysis

Qining Zhan

, 2 more and

Pengfei Zhao

1,845 views

0 citations

Single-input/single-output linear model y=a*x+b. (A–F) show the regression results for six datasets separately; each dataset has 50 points, and only dataset 1 has high linearity. The blue points denote the observed data, and the red line is the model calculated by regression. (G) shows the regression results for all the available data, including 300 points. The red solid line denotes the model calculated by all the available data, and the dashed line denotes the model calculated by dataset 1.

Original Research

23 August 2023

An automatic preselection strategy for magnetotelluric single-site data processing based on linearity and polarization direction

Hao Chen

, 3 more and

Gang Wang

1,173 views

1 citations

Original Research

24 July 2023

Impact of variable seawater conductivity on ocean wave-induced electromagnetic fields simulated with finite difference method

Jiaqi Ge

and

Yuguo Li

2,077 views

1 citations

A two-layer model is used to verify the numerical accuracy of 3D modeling for the RFLTEM. (A) 3D model. (B) Comparison between the field solutions obtained in this paper and those of Ji et al. (2017) for the receiver positions denoted by Rx1 (105, 0, 0) and Rx2 (−155, 0, 0). (C) Error curve of the QMR solver.

Original Research

13 July 2023

A general forward solver for 3D CSEMs with multitype sources and operating environments

Dajun Li

, 2 more and

Liubiao Jin

1,674 views

1 citations

Comparison of numerical results for the smooth model. (A) TM apparent resistivity pseudo-section and (B) TM phase pseudo-section simulated by the spectral element method; (C) TM apparent resistivity pseudo-section and (D) TM phase pseudo-section simulated by the finite element method (Lee et al., 2009).

Original Research

15 June 2023

An efficient spectral element method for two-dimensional magnetotelluric modeling

Xiaozhong Tong

, 1 more and

Boyao Zhang

2,060 views

4 citations

The synthetic time series and power spectrum density of the 1D model. (A) Time series with 2400Hz sampling rate, (B) Time series with 150Hz sampling rate, (C) Time series with 15Hz sampling rate, (D) power spectrum of the time series.

Original Research

09 February 2023

Synthesizing magnetotelluric time series based on forward modeling

Peijie Wang

, 1 more and

Yunyun Zhang

3,867 views

8 citations

Inversion results of H-type and K-type models. (A): least-squares inversion result of H-type model. (B): least-squares inversion result of K-type model. (C): OCCAM inversion result of H-type model. (D): OCCAM inversion result of K-type model. (E): WLCI inversion result of H-type model while vertical constrained factor is 0 and horizontal constrained factor is 0. (F): WLCI inversion result of K-type model while vertical constrained factor is 0 and horizontal constrained factor is 0. (G): WLCI inversion result of H-type model while vertical constrained factor is 1 and horizontal constrained factor is 0. (H): WLCI inversion result of K-type model while vertical constrained factor is 1 and horizontal constrained factor is 0. (I): WLCI inversion result of H-type model while vertical constrained factor is 1 and horizontal constrained factor is 1. (J): WLCI inversion result of K-type model while vertical constrained factor is 1 and horizontal constrained factor is 1.

Original Research

26 April 2023

High-resolution imaging of a coal seam based on quasi-2D TEM inversion

Chao Su

, 3 more and

Bo Zhang

2,565 views

2 citations

Apparent resistivity and error graphs (A): Apparent resistivity graph; (B): Relative error graph.

Methods

06 June 2023

Wide field electromagnetic method calculation in arbitrary orientation and its effectiveness analysis

Hongjun Tian

, 4 more and

Dexiang Zhu

1,054 views

0 citations

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