Amb motiu del tancament d'estiu, la validació de documents es reprendrà a partir del 28 d'agost de 2026. Disculpeu les molèsties.
Con motivo del cierre de verano, la validación de documentos se reanudará a partir del 28 de agosto de 2026. Disculpad las molestias
Due to the summer closure, document validation will resume starting August 28, 2026. We apologize for any inconvenience.

Files

245276.pdf (1.57 MB)

Document type

Article

Version

Accepted version

Publication date

2022-03-01

Publication license

cc-by-nc-nd (c) Elsevier Ltd, 2022
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/207171

3D magnetotelluric modeling using high-order tetrahedral Nédélec elements on massively parallel computing platforms

Journal Title

Authors

Director/Tutor

Journal ISSN

Volume Title

Related resource

https://doi.org/10.1016/j.cageo.2021.105030

Abstract

We present a routine for 3D magnetotelluric (MT) modeling based upon high-order edge finite element method (HEFEM), tailored and unstructured tetrahedral meshes, and high-performance computing (HPC). This implementation extends the PETGEM modeller capabilities, initially developed for active-source electromagnetic methods in frequency-domain. We assess the accuracy, robustness, and performance of the code using a set of reference models developed by the MT community in well-known reported workshops. The scale and geological properties of these 3D MT setups are challenging, making them ideal for addressing a rigorous validation. Our numerical assessment proves that this new algorithm can produce the expected solutions for arbitrarily 3D MT models. Also, our extensive experimental results reveal four main insights: (1) high-order discretizations in conjunction with tailored meshes can offer excellent accuracy; (2) a rigorous mesh design based on the skin-depth principle can be beneficial for the solution of the 3D MT problem in terms of numerical accuracy and run-time; (3) high-order polynomial basis functions achieve better speed-up and parallel efficiency ratios than low-order polynomial basis functions on cutting-edge HPC platforms; (4) a triple helix approach based on HEFEM, tailored meshes, and HPC can be extremely competitive for the solution of realistic and complex 3D MT models and geophysical electromagnetics in general.

Subject

Prospecció magnetotel·lúrica, Prospecció geofísica, Electromagnetisme

Subject (English)

Magnetotelluric prospecting, Geophysical exploration, Electromagnetism

Citation

Collections

Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)

Citation

CASTILLO REYES, Octavio, et al. 3D magnetotelluric modeling using high-order tetrahedral Nédélec elements on massively parallel computing platforms. Computers & Geosciences. 2022. Vol. 160. ISSN 0098-3004. [consulted: 11 of August of 2026]. Available at: https://hdl.handle.net/2445/207171

Export metadata

JSON - METS

Share record