Chapter 6 Three-dimensional modeling considering the topography for the case of the time-domain electromagnetic method

2002 ◽  
pp. 85-107 ◽  
Author(s):  
Masashi Endo ◽  
Koji Noguchi
Keyword(s):  
Time Domain ◽  
Three Dimensional ◽  
Electromagnetic Method ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Time Domain Electromagnetic ◽  
The Time Domain

scholarly journals Electromagnetic research in the Altai-Sayan mountain region

2021 ◽  
Vol 3 (2) ◽  
pp. 7-19
Author(s):  
Sergei Babushkin ◽  
Nina Nevedrova ◽  
Viktor Seleznev ◽  
Aleksei Liseikin
Keyword(s):  
Deep Structure ◽  
Three Dimensional ◽  
Sampling Step ◽  
Electromagnetic Sounding ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Electromagnetic Soundings ◽  
Time Domain Electromagnetic ◽  
The Time Domain ◽  
Sayan Mountain

A new software-measuring complex has been developed for recording non-stationary electromagnetic soundings based on mobile modules created on the basis of 24-bit ADCs, with built-in GPS receivers, with recorders located directly at the field sensors, arithmetic sampling step and recording of all signal realizations. The deep structure of the Uimon depression in Gorny Altai has been studied based on the time-domain electromagnetic sounding. Research is relevant due to the high seismic hazard of the area, and is also in demand for prospecting and exploration of predicted minerals here. To construct geoelectric models, data from several years of measurements were used, during which more than 60 soundings were performed. At this stage, the interpretation was performed using computer systems within the framework of a horizontally layered model. The interpretation results are presented in the form of sections and threedimensional visualizations, which clearly reflect the structure of the depression. Further, three-dimensional modeling and additional measurements are planned to verify and refine the results obtained.

DEEP STRUCTURE OF THE FAULT ZONE IN THE MUKHOR-TARKATA SITE OF THE CHUYA DEPRESSION ACCORDING TO NON-STATIONARY ELECTROMAGNETIC SOUNDING DATA USING THREE-DIMENSIONAL MODELING

2021 ◽  
pp. 67-73
Author(s):  
A. M. Sanchaa ◽  
◽  
N. N. Nevedrova ◽  
N. V. Shtabel ◽  
◽  
...  
Keyword(s):  
Fault Zone ◽  
Time Domain ◽  
Deep Structure ◽  
Near Field ◽  
Three Dimensional ◽  
Structural Features ◽  
Electromagnetic Sounding ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Time Domain Electromagnetic

The paper presents the results of three-dimensional modeling of the fault structure in the central part of the Chuya depression in Gornyi Altai within the Mukhor-Tarkhata plot. On this site, from 2004 to the present, researchers of the IPGG SB RAS have been conducting regular annual observations by the method of nearfield time-domain electromagnetic sounding (TSB) to observe the process of restoration of the geological environment after the catastrophic Chuya earthquake with a magnitude of 7.3 in 2003. One of the aftereffects of the destructive earthquake is fracture zones expressed on the surface. Numerous deformations of the surface and industrial objects are observed in the area of the Mukhor-Tarkhata village. The fault zone with sub-vertical fracturing, identified at the site by geological and electromagnetic data, was activated after the earthquake. Detailed data on the geoelectric structure are required for the interpretation and analysis of monitoring data. Based on the interpretation of the near-field time-domain electromagnetic sounding data, the deep structure of the fault zone was obtained. To verify and clarify structural features of the geoelectric model, three-dimensional modeling was performed.

Hydrogeophysical exploration of three-dimensional salinity anomalies with the time-domain electromagnetic method (TDEM)

2010 ◽  
Vol 380 (3-4) ◽  
pp. 318-329 ◽  
Author(s):  
Peter Bauer-Gottwein ◽  
Bibi N. Gondwe ◽  
Lars Christiansen ◽  
Daan Herckenrath ◽  
Lesego Kgotlhang ◽  
...  
Keyword(s):  
Time Domain ◽  
Three Dimensional ◽  
Electromagnetic Method ◽  
Time Domain Electromagnetic ◽  
The Time Domain

scholarly journals Convergence of the uniaxial PML method for time-domain electromagnetic scattering problems

2021 ◽  
Author(s):  
Changkun Wei ◽  
Jiaqing Yang ◽  
Bo Zhang
Keyword(s):  
Time Domain ◽  
Electromagnetic Scattering ◽  
Scattering Problem ◽  
Three Dimensional ◽  
Scattering Problems ◽  
Laplace Transform Technique ◽  
The Laplace Transform ◽  
Time Domain Electromagnetic ◽  
Numer Anal ◽  
The Time Domain

In this paper, we propose and study the uniaxial perfectly matched layer (PML) method for three-dimensional time-domain electromagnetic scattering problems, which has a great advantage over the spherical one in dealing with problems involving anisotropic scatterers. The truncated uniaxial PML problem is proved to be well-posed and stable, based on the Laplace transform technique and the energy method. Moreover, the $L^2$-norm and $L^{\infty}$-norm error estimates in time are given between the solutions of the original scattering problem and the truncated PML problem, leading to the exponential convergence of the time-domain uniaxial PML method in terms of the thickness and absorbing parameters of the PML layer. The proof depends on the error analysis between the EtM operators for the original scattering problem and the truncated PML problem, which is different from our previous work (SIAM J. Numer. Anal. 58(3) (2020), 1918-1940).

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