Uncertainty and resolution analysis of 2D and 3D inversion models computed from geophysical electromagnetic data

Z Ren, T Kalscheuer - Surveys in Geophysics, 2020 - Springer
A meaningful solution to an inversion problem should be composed of the preferred
inversion model and its uncertainty and resolution estimates. The model uncertainty …

Electromagnetic subsurface imaging in the presence of metallic structures: a review of numerical strategies

O Castillo-Reyes, P Queralt, P Piñas-Varas, J Ledo… - Surveys in …, 2024 - Springer
Electromagnetic (EM) imaging aims to produce large-scale, high-resolution soil conductivity
maps that provide essential information for Earth subsurface exploration. To rigorously …

An efficient multigrid solver based on a four-color cell-block Gauss-Seidel smoother for 3D magnetotelluric forward modeling

R Guo, Y Wang, GD Egbert, J Liu, R Liu… - …, 2022 - pubs.geoscienceworld.org
Practical application of 3D magnetotelluric inversion requires efficient forward modeling of
electromagnetic (EM) fields in the earth. To resolve realistic 3D structures, large …

Deformation of crust and upper mantle in central Tibet caused by the northward subduction and slab tearing of the Indian lithosphere: New evidence based on shear …

C Wu, X Tian, T Xu, X Liang, Y Chen, M Taylor… - Earth and Planetary …, 2019 - Elsevier
Shear-wave splitting provides insight into geodynamic processes such as lithospheric
deformation and upper mantle flow. This study presents shear wave splitting parameters …

An efficient cascadic multigrid solver for 3-D magnetotelluric forward modelling problems using potentials

K Pan, J Wang, S Hu, Z Ren, T Cui… - Geophysical Journal …, 2022 - academic.oup.com
The fast and accurate 3-D magnetotelluric (MT) forward modelling is core engine of the
interpretation and inversion of MT data. In this study, we develop an improved extrapolation …

Parallel 3-D marine controlled-source electromagnetic modelling using high-order tetrahedral Nédélec elements

O Castillo-Reyes, J de la Puente… - Geophysical Journal …, 2019 - academic.oup.com
We present a parallel and high-order Nédélec finite element solution for the marine
controlled-source electromagnetic (CSEM) forward problem in 3-D media with isotropic …

Fully anisotropic 3-D EM modelling on a Lebedev grid with a multigrid pre-conditioner

P Jaysaval, DV Shantsev… - Geophysical Journal …, 2016 - academic.oup.com
We present a numerical algorithm for 3-D electromagnetic (EM) simulations in conducting
media with general electric anisotropy. The algorithm is based on the finite-difference …

Performance investigations of auxiliary‐space Maxwell solver preconditioned iterative algorithm for controlled‐source electromagnetic induction problems with …

Z Liu, H Yao, F Wang - Geophysical Prospecting, 2024 - Wiley Online Library
Many studies have highlighted the superior performance of iterative solvers employing the
auxiliary‐space Maxwell solver preconditioner in controlled‐source electromagnetic …

Neural incomplete factorization: learning preconditioners for the conjugate gradient method

P Häusner, O Öktem, J Sjölund - arxiv preprint arxiv:2305.16368, 2023 - arxiv.org
The convergence of the conjugate gradient method for solving large-scale and sparse linear
equation systems depends on the spectral properties of the system matrix, which can be …

Three-dimensional edge-based finite element modeling of magnetotelluric data in anisotropic media with a divergence correction

J Zhou, X Hu, T **ao, H Cai, J Li, R Peng… - Journal of Applied …, 2021 - Elsevier
When simulating a 3-D magnetotelluric (MT) response, the convergence rate slows at low
frequencies. Previous works have shown that by implementing divergence correction, the …