3D Forward model- Northwest Himalaya, India

Published: 7 May 2024| Version 1 | DOI: 10.17632/3ykn7shzrf.1
Dhamodharan Socrates


The geometric variability of the Main Himalyan Thrust (MHT) holds significant implications for the occurrence of major and great earthquakes. The investigation into the lateral geometry changes of the MHT beneath the north-western Himalayas aims to gain insights into potential crustal models through 3D magnetotelluric (MT) forward modeling. MT impedance tensors were computed utilizing the 3D forward modeling code MTD3FWD. Previously established MT resistivity and seismic velocity models from various sectors of the north-western Himalayas were employed as inputs for generating the resistivity mesh necessary for 3D forward modeling. The computed impedance tensors by 3D forward computation were cross-referenced with the original published MT data to validate their accuracy. Additionally, a lateral resistivity cross-section is derived from the 3D forward model along the sub-Himalaya and lesser-Himalaya region to study the lateral heterogeneity. The lateral resistivity cross-section reveals significant heterogeneity within the crust, marked by both high and low resistive structures, as well as a possible lateral ramp along the MHT. The 3D forward model has been uploaded here for the model to make transparency and reproducibility.


Steps to reproduce

One can easily reproduce the model/data with WINGLinG software.


National Geophysical Research Institute CSIR