COMpUTATIONAL GEODYNAMICS LAB
Our research involves constant investigation and redesigning of the scientific questions posed towards complex geodynamics of the earth . The strength of research lies in the breadth and depth of the experimental and theoretical seismology, where I use three major seismological components to solve the complex dynamics Earth. These three major domains are: Seismic anisotropy, Crustal dynamics by RF inversion and High resolution tomography.
RESEARCH PROJECTS UNDERTAKEN
Principal Investigator of DST-SERB (Science and Engineering Research Board, India) sponsored project titled "Source localized modeling of the central depth of anisotropy beneath the north-eastern Himalaya and tectonic implications", Mathematical Research Impact Centric Support (MATRICS) Grant, 2023-2026.
Principal Investigator of DST-SERB (Science and Engineering Research Board, India) sponsored project titled “Active Geodynamics, Evolution, Structure and Deformation analysis of Indo-Burmese Wedge”, Early Career Research Award, 2019.
Co-investigator of CPCB (Central Pollution Control Board) sponsored project titled “Assessment of Air, water and soil quality in Baghjan oil blowout site and its vicinity, Tinsukia, Assam”, 2020.
Co-investigator of MDONER (Ministry of Development of North East Region) sponsored project titled “Real time seismic monitoring of North East Himalaya”, 2020 - 2025.
Co-Investigator of CSIR-FBR sponsored project under the Fully Basic Research Category; “Earthquake Hazard Studies in Moderate and Severe Seismic Zones of India (EHIND)”, 2021-2023.
Geodynamics of NE India and surroundings
New shear wave splitting measurements are obtained from the North East Indian region utilizing the core refracted PKS/SKS/SKKS phases, suggesting the region as more complex and anisotropic in nature. The splitting parameters namely time delays (δt) and fast polarization directions (ϕ) are computed and the results are found to be more consistent with the geologic/tectonic structures and present mantle deformation patterns under this particular region. The result streamlines the deformation patterns strictly into three categories. Significant anisotropy in the western fringe of Shillong plateau and surrounding regions implies an asthenospheric flow related strain dominating the splitting direction inline the direction of absolute plate motion (APM) of the Indian plate in a no net reference frame and discards the effects from lithospheric strain. The stations in Himalayan collision zone redefines an actual deformation pattern in ENE-WSW direction in line with the maximum shear plane construing the Himalayan arc at the northeast corner as a consequence of N-S Indo-Eurasian collisional derived lithospheric strain. The anisotropic effect at the Himalayan foredeep section signifies the lithospheric strain induced E-W deformation from N-S continental collision. Mapping the anisotropic layer depth under these stations also strengthens our anisotropic observations and geodynamics understanding of this region with a similar thought of ideas where the deformation patterns are supposed to be dominated by huge forces like APM and lithospheric strains with negligible effects from the local geological structures.
High resolution tomographic image of India
Seismic tomography has evolved as a high-end technique to image and observe the deep earth processes by throgh the inversion of earthquake wave forms. The new and updated computational linear and non-linear algorithms have evolved as an effective tools to observe and scaleout the large scale processes. High resolution seismic tomography of Indian subcontinent is prepared. I have worked in the anisotropic models and tried to incorporate the effects of anisotropy to observe the changes in the Isotropic velocity models. The changes are prone and the deep Earth structures get modified by incorporating these results.