Research

Projects

Studying Subsurface Dynamics Beneath the Giant Sequoias Using Full-3D Seismic Tomography and Full-Waveform Inversion

Developing an interactive seismic first arrival picker which includes automatic pickers based on dynamic time warping (DTW) algorithm and STA/LTA.
Full- 3D high resolution seismic refraction tomography.
A stochastic inversion and uncertainty quantification subroutine based on Ensemble Smoother with Multiple Data Assimilation (ES-MDA).

Detailed study of fracture network and aquifer systems in hard-rock granitic subsurface environment using full-3D electrical resistivity tomography (ERT) and airborne electromagnetics (AEM).

Development of processing and inversion, tools and subroutines based on machine learning techniques for electrical resistivity tomography (ERT) using PYTHON.
Acquisition of 2D and 3D full waveform geo-electrical Data using IRIS V-Fullwaver in granitic hard-rock terrains of southern and complex geological settings in arid regions of western India.
Acquisition, Processing, and Inversion of Airborne Electromagnetic data from arid regions of India.

Inversion of two-dimensional electrical resistivity data using deep neural networks - UNET, PSPNET, SEGNET to compare and improve accuracy of the results.

This work is fully based on PYTHON. A Finite element approach with a triangular mesh grid for forward modelling.
Using convolutional neural networks architectures for training and inversion.

Publications and Presentations

[1] Kehinde David Oyeyemi, Shiv Mangal Gupta, Prawan Koppula, Kushal Pal Singh. Geoelectrical resistivity imaging as a reliable input for building sustainable agroecological models: a case in southwestern Nigeria.

Acta Geophysica (2025) (DOI)

[2] Shiv Mangal Gupta, W Steven Holbrook, Denise Burgett, Ben Eppinger, Sean Bemis, Claire Lukens, Cliff Riebe. Uncovering the Secrets Beneath Giant Sequoias using Seismic Refraction Tomography Coupled with Advanced Seismic First Arrival Picker. AGU Fall Meeting 2024 (DOI)

[3] Shiv Mangal Gupta, W Steven Holbrook. What is the Subsurface Critical Zone Structure Beneath the World’s Largest Trees: The Sequoias? CZNet All Hands Meeting, 2024

[4] VP Maurya, Shiv Mangal Gupta, A Mishra, S Chandra, VM Tiwari. Three-dimensional electric-field vector resistivity imaging for deep subsurface fractures network in heterogeneous crystalline rocks. Geophysical Journal International, Volume 236, Issue 1, January 2024, Pages 305–321. (DOI)

[5] Shiv Mangal Gupta, Deepak Devpal, Divakar Vashisth, Ved Prakash Maurya, Subash Chandra. Inversion of Two-dimensional Electrical Resistivity data using Convolution Neural Network (U-Net). AGU Fall Meeting 2022 (DOI)